Good preparation is most of the result — and the single biggest mistake is reaching for wax instead of a razor.
What should I do before laser hair removal? Shave the area one to two days beforehand (never wax, pluck or thread), avoid sun exposure and tanning for at least two weeks, arrive with clean product-free skin, and disclose your medications and medical history at consultation.
Shave, do not wax
The most important rule
Shave the area one to two days before your session. Laser targets pigment in the hair follicle, so the root must still be in place.
Why waxing ruins it
Waxing, plucking, threading and epilating remove the root, leaving nothing for the laser to target — which wastes the session entirely.
Avoid sun and tanning
At least two weeks
Avoid deliberate sun exposure, tanning beds and self-tanner for at least two weeks beforehand. Tanned skin has more surface pigment, which affects safe settings.
Postpone if sunburnt
Treatment should be deferred on sunburnt or irritated skin until it has fully recovered — see laser and sun exposure.
On the day
Arrive with the area:
- Freshly shaved one to two days prior
- Clean and completely dry
- Free of lotion, oil, moisturiser or sunscreen
- Free of deodorant, for underarm treatment
- Free of make-up, for facial treatment
Preparation timeline
| When | What to do |
|---|---|
| 2+ weeks before | Stop sun exposure, tanning and self-tanner |
| 1 week before | Stop retinoids or exfoliating acids if advised |
| 1–2 days before | Shave the treatment area |
| Day of | Clean, dry, product-free skin |
| At the clinic | Wear the protective eyewear provided |
Follow your clinician’s specific instructions, which may differ.
What to disclose at consultation
Medications matter
Some medications increase light sensitivity, so list everything you take, including supplements and topical treatments.
Medical history and pregnancy
Disclose skin conditions, recent treatments, a history of cold sores in the area, and whether you are or may be pregnant — see laser hair removal and pregnancy.
What to stop beforehand
Ask your clinician about pausing:
- Retinoids and strong exfoliating acids on the area
- Self-tanning products
- Waxing, plucking and threading entirely
- Perfumed products on the area on the day
- Any treatment that irritates the skin
Consider a patch test
Especially for deeper skin tones
A patch test lets your clinician see how your skin responds before treating a full area — sensible for more pigmented skin, and reassuring for anyone nervous.
Settings can then be built
Starting conservatively and adjusting based on your response is standard, safe practice. Health authority guidance emphasises trained operators and appropriate controls.
Your pre-treatment checklist
A simple routine before each session:
- Avoid sun, tanning beds and self-tanner for at least two weeks.
- Pause retinoids or exfoliating acids on the area if advised.
- Shave the area one to two days before — never wax or pluck.
- Arrive with clean, dry, product-free skin.
- Disclose any new medications or skin changes.
- Wear the protective eyewear provided throughout.
Laser hair removal at LIV Clinic Koh Samui
At LIV Clinic, laser hair removal includes clear preparation guidance, doctor-led by Dr. Narathai. Read the aftercare guide, or book a consultation.
Frequently asked questions
What should I do before laser hair removal?
Shave the area one to two days beforehand (never wax or pluck), avoid sun and tanning for at least two weeks, arrive with clean product-free skin, and disclose your medications.
Should I shave before laser hair removal?
Yes, one to two days before. Laser targets pigment in the follicle, so the root must remain in place — which is why shaving is correct and waxing is not.
Why can’t I wax before laser?
Waxing, plucking and threading remove the hair root, leaving nothing for the laser to target. This wastes the session, so shave instead throughout your course.
How long should I avoid the sun before laser?
At least two weeks without deliberate sun exposure, tanning beds or self-tanner. Tanned skin has more surface pigment, which affects safe laser settings.
What should I not put on my skin before treatment?
Arrive with clean, dry skin free of lotion, oil, sunscreen, deodorant and make-up. Ask about pausing retinoids or strong exfoliating acids on the area.
What should I tell the clinic beforehand?
All medications and supplements, any skin conditions or recent treatments, a history of cold sores in the area, and whether you are or may be pregnant.
Safety and consultation
Laser hair removal is a medical laser procedure and, like any energy-based treatment, carries some risk — common temporary effects can include redness, mild swelling around the follicles and a warm sensation, while less common effects such as pigment changes or blistering are minimised by correct laser choice and settings. Results vary from person to person, and no specific outcome can be promised. This article is general information, not medical advice.
At LIV Clinic, every treatment begins with an in-person assessment by Dr. Narathai Vichienkalayarut, M.D., who reviews your skin, medical history and goals before recommending a personalized plan. Book a consultation to find out whether this treatment suits you.
LIV Clinic — “Live Your Life Young”
Doctor-led aesthetic and wellness clinic on Koh Samui and Koh Phangan, serving both international visitors and local residents.
Koh Samui (Bophut): 1/63 Thaweeratpakdee Rd, Bo Put, Koh Samui, Surat Thani 84320 · Tel 065-996-4242
Koh Phangan: 116/16 Moo 1, Koh Phangan, Surat Thani 84280 · Tel 093-254-5259
LINE: @Livclinic · Book a consultation
Explore our laser hair removal and HIFU and skin-tightening services.
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