General health conditions

Severe dehydration — beauty treatment safety

Name: Severe dehydration: which treatments are safe?
Creator: Anna

Also called Severe dehydration, dehydration, severely dehydrated, dehydrated.

In short

On this page, Severe dehydration is checked against 88 treatments: 88 are ones to avoid. The tightest restrictions are in Facials and Body Treatments.

Most oftenAvoid

Every treatment name opens its own page

Facials

25 treatments · all 25 to avoid

Facials — Severe dehydration
What we found	Treatment
Avoid	AHA Peel (Glycolic / Lactic / Mandelic)Also: glycolic peel, lactic peel, mandelic peel, alpha hydroxy peel, light chemical peel Why, and the source — AHA Peel (Glycolic / Lactic / Mandelic) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	BHA Peel (Salicylic)Also: salicylic peel, beta hydroxy peel, acne peel Why, and the source — BHA Peel (Salicylic) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Carbon Laser FacialAlso: Hollywood peel, China doll peel, carbon peel Why, and the source — Carbon Laser Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Classic FacialAlso: European facial, deep cleansing facial, traditional facial Why, and the source — Classic Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Cryo FacialAlso: ice facial, cold therapy facial, frotox Why, and the source — Cryo Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	DermaplaningAlso: blade exfoliation, facial shaving, peach fuzz removal Why, and the source — Dermaplaning Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Enzyme PeelAlso: fruit enzyme peel, papain peel, bromelain peel Why, and the source — Enzyme Peel Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Express FacialAlso: mini facial, 30-minute facial, lunchtime facial Why, and the source — Express Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Galvanic FacialAlso: iontophoresis, desincrustation, galvanic current Why, and the source — Galvanic Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	HIFU (Ultherapy)Also: Ultherapy, high-intensity focused ultrasound, non-surgical lifting, ultrasound lifting Why, and the source — HIFU (Ultherapy) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	High-Frequency FacialAlso: high-frequency wand, violet ray treatment Why, and the source — High-Frequency Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	HydraFacialAlso: hydradermabrasion, hydra facial, aqua facial Why, and the source — HydraFacial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Jessner's PeelAlso: combination peel, modified Jessner Why, and the source — Jessner's Peel Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	LED Light TherapyAlso: red light therapy, blue light therapy, yellow light therapy, LED facial Why, and the source — LED Light Therapy Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Mesotherapy (Facial)Also: meso facial, vitamin injections, skin booster injections (face) Why, and the source — Mesotherapy (Facial) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Microcurrent FacialAlso: NuFace, non-surgical facelift, facial toning Why, and the source — Microcurrent Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	MicrodermabrasionAlso: crystal microdermabrasion, diamond microdermabrasion, MDA Why, and the source — Microdermabrasion Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	MicroneedlingAlso: dermapen, dermaroller, collagen induction therapy, CIT, skin needling Why, and the source — Microneedling Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Oxygen FacialAlso: Intraceuticals, oxygen infusion facial Why, and the source — Oxygen Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Phenol Peel (Deep)Also: deep chemical peel, Baker-Gordon peel Why, and the source — Phenol Peel (Deep) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	PRP Facial (Vampire Facial)Also: platelet-rich plasma facial, vampire facial, blood facial Why, and the source — PRP Facial (Vampire Facial) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Radiofrequency (RF) FacialAlso: Thermage, Venus Freeze (face), skin tightening RF Why, and the source — Radiofrequency (RF) Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	RF MicroneedlingAlso: Morpheus8, Profound, Vivace, Genius RF, radio frequency microneedling Why, and the source — RF Microneedling Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	TCA Peel (Medium)Also: trichloroacetic acid peel, medium depth peel Why, and the source — TCA Peel (Medium) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Ultrasound FacialAlso: ultrasonic facial, cavitation peel Why, and the source — Ultrasound Facial Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation

Injectables

11 treatments · all 11 to avoid

Injectables — Severe dehydration
What we found	Treatment
Avoid	Biostimulators (Sculptra, Radiesse, Ellanse)Also: Sculptra, Radiesse, Ellanse, collagen stimulators, PLLA, calcium hydroxylapatite Why, and the source — Biostimulators (Sculptra, Radiesse, Ellanse) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Botox / NeurotoxinAlso: botulinum toxin, Dysport, Xeomin, Azzalure, Bocouture, anti-wrinkle injections, wrinkle relaxers, tox Why, and the source — Botox / Neurotoxin Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Cheek FillersAlso: midface filler, cheek augmentation, Voluma Why, and the source — Cheek Fillers Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Dermal Fillers (General)Also: hyaluronic acid fillers, HA fillers, Juvederm, Restylane, Belotero Why, and the source — Dermal Fillers (General) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Fat-Dissolving InjectionsAlso: Aqualyx, Kybella, deoxycholic acid, lipolysis injections Why, and the source — Fat-Dissolving Injections Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Lip FillersAlso: lip augmentation, lip enhancement, lip injections Why, and the source — Lip Fillers Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Mesotherapy (Body)Also: body meso, fat-loss mesotherapy, cellulite mesotherapy Why, and the source — Mesotherapy (Body) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	PDO Thread LiftAlso: thread lift, PDO threads, PLLA threads, Silhouette Soft, non-surgical thread lift Why, and the source — PDO Thread Lift Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	PolynucleotidesAlso: Plinest, Newest, PN injection, salmon DNA injection Why, and the source — Polynucleotides Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Skin Boosters (Profhilo, Restylane Skinbooster)Also: Profhilo, Restylane Vital, Restylane Skinbooster, hydration injections Why, and the source — Skin Boosters (Profhilo, Restylane Skinbooster) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Tear Trough FillersAlso: under-eye filler, under-eye treatment Why, and the source — Tear Trough Fillers Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation

Laser & Light

7 treatments · all 7 to avoid

Laser & Light — Severe dehydration
What we found	Treatment
Avoid	Fractional Ablative LaserAlso: CO2 laser, Erbium laser, ablative resurfacing Why, and the source — Fractional Ablative Laser Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Fractional Non-Ablative LaserAlso: Fraxel, Clear + Brilliant, non-ablative resurfacing Why, and the source — Fractional Non-Ablative Laser Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	IPL (Intense Pulsed Light)Also: intense pulsed light, photofacial, fotofacial, IPL photorejuvenation Why, and the source — IPL (Intense Pulsed Light) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Laser Hair RemovalAlso: LHR, diode laser, Alexandrite laser, Nd:YAG laser, permanent hair reduction Why, and the source — Laser Hair Removal Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Photodynamic Therapy (PDT)Also: PDT, blue light + ALA therapy, Levulan therapy Why, and the source — Photodynamic Therapy (PDT) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Pigment Laser (Q-Switched / Pico)Also: Q-switched laser, Pico laser, PicoSure, PicoWay, tattoo removal laser Why, and the source — Pigment Laser (Q-Switched / Pico) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Vascular LaserAlso: V-Beam, KTP laser, pulsed dye laser, broken capillaries laser Why, and the source — Vascular Laser Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation

Body Treatments

15 treatments · all 15 to avoid

Body Treatments — Severe dehydration
What we found	Treatment
Avoid	Aromatherapy MassageAlso: essential oil massage Why, and the source — Aromatherapy Massage Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Body PeelAlso: chemical body peel, back peel, body acid treatment Why, and the source — Body Peel Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Body ScrubAlso: body exfoliation, salt scrub, sugar scrub, body polish Why, and the source — Body Scrub Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Body WrapsAlso: algae wrap, mud wrap, paraffin wrap, seaweed wrap, detox wrap Why, and the source — Body Wraps Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Cryolipolysis (CoolSculpting)Also: CoolSculpting, fat freezing, cool sculpting, Zeltiq Why, and the source — Cryolipolysis (CoolSculpting) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Deep Tissue MassageAlso: sports massage, remedial massage, firm pressure massage Why, and the source — Deep Tissue Massage Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	EMSculpt / EMS Body TreatmentsAlso: EMSculpt, Emsella, electromagnetic muscle stimulation, HIFEM Why, and the source — EMSculpt / EMS Body Treatments Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	EndermologieAlso: LPG, mechanical roller massage, endermology, cellulite massage Why, and the source — Endermologie Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Hot Stone MassageAlso: stone therapy, geothermal massage Why, and the source — Hot Stone Massage Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Lymphatic Drainage MassageAlso: MLD, manual lymphatic drainage, Vodder technique Why, and the source — Lymphatic Drainage Massage Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Prenatal / Pregnancy MassageAlso: pregnancy massage, maternity massage Why, and the source — Prenatal / Pregnancy Massage Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	PressotherapyAlso: compression boots, Ballancer, lymphatic pressotherapy Why, and the source — Pressotherapy Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Radiofrequency Body TreatmentsAlso: Venus Legacy, Exilis, body RF, skin tightening RF (body) Why, and the source — Radiofrequency Body Treatments Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Swedish MassageAlso: classic massage, relaxation massage, full-body massage Why, and the source — Swedish Massage Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Ultrasonic CavitationAlso: body cavitation, ultrasonic fat reduction, cavi-lipo Why, and the source — Ultrasonic Cavitation Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation

Hair Removal

6 treatments · all 6 to avoid

Hair Removal — Severe dehydration
What we found	Treatment
Avoid	Depilatory CreamAlso: chemical hair removal, hair removal cream, Veet, Nair Why, and the source — Depilatory Cream Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	ElectrolysisAlso: needle electrolysis, permanent hair removal, galvanic electrolysis Why, and the source — Electrolysis Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Hot WaxAlso: hard wax, Brazilian wax, hot wax depilation Why, and the source — Hot Wax Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Strip Wax (Soft Wax)Also: soft wax, strip waxing, honey wax Why, and the source — Strip Wax (Soft Wax) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	SugaringAlso: sugar paste depilation, Egyptian sugaring, Persian sugaring Why, and the source — Sugaring Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	ThreadingAlso: eyebrow threading, facial threading, khite Why, and the source — Threading Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation

Nails

10 treatments · all 10 to avoid

Nails — Severe dehydration
What we found	Treatment
Avoid	Acrylic NailsAlso: liquid and powder nails, L&P nails, sculpted acrylics Why, and the source — Acrylic Nails Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Builder Gel / BIABAlso: BIAB, builder in a bottle, hard gel, structure gel Why, and the source — Builder Gel / BIAB Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Classic ManicureAlso: regular manicure, traditional manicure, polish manicure Why, and the source — Classic Manicure Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Classic PedicureAlso: regular pedicure, spa pedicure Why, and the source — Classic Pedicure Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Gel ManicureAlso: Shellac, gel polish, soak-off gel, CND Shellac Why, and the source — Gel Manicure Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Gel PedicureAlso: Shellac pedicure, gel polish pedicure Why, and the source — Gel Pedicure Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Medical PedicureAlso: med pedi, podiatry pedicure, Margaret Dabbs pedicure Why, and the source — Medical Pedicure Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Nail Strengthening TreatmentsAlso: IBX, nail repair treatment, nail bond treatment Why, and the source — Nail Strengthening Treatments Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Polygel NailsAlso: poly gel, gel-acrylic hybrid Why, and the source — Polygel Nails Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Press-On NailsAlso: adhesive nails, stick-on nails, nail tips Why, and the source — Press-On Nails Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation

Lashes & Brows

8 treatments · all 8 to avoid

Lashes & Brows — Severe dehydration
What we found	Treatment
Avoid	Brow LaminationAlso: brow perm, brow sculpting Why, and the source — Brow Lamination Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Brow TintAlso: eyebrow tinting, brow dye Why, and the source — Brow Tint Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Classic Lash ExtensionsAlso: individual lashes, 1:1 lash extensions Why, and the source — Classic Lash Extensions Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Henna BrowsAlso: henna brow tinting Why, and the source — Henna Brows Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Hybrid Lash ExtensionsAlso: mixed lash extensions Why, and the source — Hybrid Lash Extensions Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Lash LiftAlso: lash perm, keratin lash lift Why, and the source — Lash Lift Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Lash TintAlso: eyelash tinting, lash dye Why, and the source — Lash Tint Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Volume Lash ExtensionsAlso: Russian volume, fan lashes, 2D-6D lashes Why, and the source — Volume Lash Extensions Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation

Permanent Makeup (PMU)

6 treatments · all 6 to avoid

Permanent Makeup (PMU) — Severe dehydration
What we found	Treatment
Avoid	Areola TattooAlso: 3D nipple tattoo, post-mastectomy tattoo Why, and the source — Areola Tattoo Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Eyeliner TattooAlso: permanent eyeliner, lash line enhancement, lash line tattoo Why, and the source — Eyeliner Tattoo Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Lip Blush / Lip TattooAlso: lip tint tattoo, permanent lip colour, aquarelle lips Why, and the source — Lip Blush / Lip Tattoo Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Microblading (Eyebrows)Also: eyebrow embroidery, feather brows, hair-stroke brows Why, and the source — Microblading (Eyebrows) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Powder Brows / Ombré BrowsAlso: machine brows, ombre brows, shading brows Why, and the source — Powder Brows / Ombré Brows Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation
Avoid	Scalp Micropigmentation (SMP)Also: SMP, hair tattoo, scalp tattoo Why, and the source — Scalp Micropigmentation (SMP) Badly dehydrated is not the state to have a treatment in, and it is worth rescheduling rather than pushing through. Dehydration drops your blood pressure, which makes fainting much more likely when you have been lying still and then sit up quickly, or when a treatment involves heat, pain or the sight of a needle. Your skin also heals less well when there is not enough fluid in it, so anything that relies on recovery gives a worse result. Drink, eat, rest, and rebook for a day when you feel like yourself. Sources: General Medical Council (UK)UK legislation

Sources

General Medical Council (UK)Good Medical Practice
UK legislationMental Capacity Act 2005

Written by Anna · London-trained cosmetologist

Last updated 3 September 2026

Every treatment, checked