By LIV Clinic · Medically reviewed by Dr. Narathai Vichienkalayarut, M.D. · Published August 26, 2026

In a climate this humid, excessive sweating is not vanity — it is a daily quality-of-life problem.

Is Botox for sweating available on Koh Samui? Yes — Botox for excessive sweating (hyperhidrosis) is available at doctor-led clinics on Koh Samui, including LIV Clinic. It blocks the signal that activates sweat glands, and is an established, approved treatment for severe underarm sweating.

What Botox for sweating is

An established medical use

The International Hyperhidrosis Society notes that in 2004 the US FDA approved Botox for severe primary axillary hyperhidrosis — excessive underarm sweating — in people who cannot get relief from antiperspirants.

Not a cosmetic treatment

This is a functional, quality-of-life treatment rather than a cosmetic one, though it uses the same botulinum toxin.

How it works

Blocking the sweat signal

Botox temporarily blocks the chemical that switches sweat glands on. The International Hyperhidrosis Society describes it as temporarily blocking the secretion of the chemical responsible for activating sweat glands.

Only where injected

It reduces sweating in the treated area only — you continue to sweat normally elsewhere, so the body still regulates its temperature.

How well it works

The evidence

According to the reported research, Botox can reduce underarm sweating by around 82% to 87% — a substantial improvement for most people, though results vary.

Timeline

Most people notice a reduction within two to four days, with the fuller effect usually apparent within about two weeks.

Where it can be used

Common treatment areas include:

• Underarms (the most studied and approved area)
• Palms of the hands
• Soles of the feet
• Forehead and scalp (craniofacial)
• Other small localised areas

Underarms first

Underarms are the best-studied area with the strongest results; other areas can be more uncomfortable to treat and are discussed individually.

Sessions, dose and longevity

*Typical figures reported by the International Hyperhidrosis Society; your dose is confirmed at consultation. It is a repeatable, not permanent, treatment.

Why it suits life in the tropics

Humidity makes it harder

Koh Samui’s heat and humidity can make excessive sweating significantly more distressing, affecting clothing, confidence and daily comfort.

Longer-lasting than cosmetic Botox

Because it targets glands rather than muscles, sweating results often last longer than cosmetic Botox — commonly four to twelve months.

Preparing for and recovering from sweating treatment

The visit is quick and simple:

1. Have a consultation so Dr. Narathai can confirm hyperhidrosis and suitability.
2. Mention any antiperspirants or treatments already tried.
3. Avoid alcohol and blood-thinning supplements for 24–48 hours before, where appropriate.
4. Arrive with clean, shaved-as-usual underarms and no deodorant on the day.
5. Avoid saunas, heavy exercise and heat for the first 24 hours.
6. Expect results in 2–4 days and full effect at about two weeks.

Botox for sweating at LIV Clinic Koh Samui

At LIV Clinic, treatment for excessive sweating is doctor-led by Dr. Narathai, using genuine Thai FDA-registered product — a practical option for island life. Explore our Botox and wrinkle treatments, read about how long Botox lasts in the tropics, or book a consultation.

Frequently asked questions

Safety and consultation

Botox for excessive sweating is a medical procedure and, like any injectable, carries some risk — common temporary effects can include redness, swelling, bruising or a mild headache, and less common reactions are possible. 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.