Gangnam
Dr. Yoon-Gon Ryu
Aesthetic Medicine Specialist
Flagship clinic · KOL for leading lifting & regenerative devices · Featured in Authority Magazine (2026)
Intradermal botulinum toxin type A temporarily blocks sweat-gland signals, with studies reporting sweat reductions that typically last around 4 to 9 months per session.
To choose a good hyperhidrosis clinic in Seoul, look for accurate diagnosis of the sweating area, correct intradermal botulinum toxin type A technique using a starch-iodine map, transparent consultation-led planning, and English support. At Reberry Clinic, the clinic’s doctors assess your pattern first, then treat armpits, palms, or soles individually rather than by a fixed menu.
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Hyperhidrosis is excessive sweating beyond what the body needs for temperature control, most often affecting the armpits (axillary), palms, or soles. It is common, frequently starts in adolescence, and can interfere with work, handshakes, writing, and confidence. Primary focal hyperhidrosis has no underlying disease and responds well to targeted treatment, while secondary sweating linked to another condition needs medical review first.
The mainstay in-clinic treatment is intradermal botulinum toxin type A. Injected in a fine grid into the skin, it temporarily blocks the acetylcholine signal that tells sweat glands to activate, so the treated area produces much less sweat for months. It is not surgery and does not remove sweat glands; the effect is temporary and repeatable, which is why it suits people who want control without a permanent procedure.
At Reberry Clinic, hyperhidrosis care is consultation-led. The clinic’s doctors confirm which areas are affected, rule out secondary causes, map the sweating zone, and plan dosing per area. International patients are supported in English across three Seoul-area locations (Gangnam, Myeongdong, Incheon Airport), so treatment can be timed around your visit to Korea.
Sweat glands are switched on by the neurotransmitter acetylcholine released from small sympathetic nerve endings in the skin. Botulinum toxin type A works by blocking that acetylcholine release locally at the injection site, so the nerve signal never reaches the sweat gland and sweating in that patch falls sharply. Because the toxin acts only where it is placed, a clinician injects a fine, evenly spaced grid across the affected zone, typically 1 to 2 cm apart, so the whole area is covered. The sweating map is often defined first with a starch-iodine (Minor’s) test, which stains active sweat areas dark so injections target exactly where sweat is heaviest. The effect builds over a few days, peaks within about 1 to 2 weeks, and gradually wears off as nerve endings recover, which is why sessions are repeated. Correct depth (intradermal, not deep into muscle) and accurate spacing are what separate a comfortable, even result from patchy relief, so technique and mapping matter more than any single product.
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The clinic’s doctors confirm which of the 3 common areas (armpits, palms, soles) are affected and check that sweating is primary, not caused by another condition.
A starch-iodine test can be used to stain active sweating, so injection points are placed exactly where sweat is heaviest across the area.
Dosing is set per area, since armpits, palms, and soles each need a different number of injection points spaced about 1 to 2 cm apart.
Botulinum toxin type A is placed in a fine grid within the skin; the session usually takes about 15 to 30 minutes depending on how many areas are treated.
Sweat reduction builds over a few days and peaks within about 1 to 2 weeks, then holds for several months before a repeat is considered.
See representative outcomes from Reberry Clinic. Results build gradually and vary by individual; your plan is assessed at consultation.
The clinic’s doctors confirm which areas sweat excessively, rule out secondary causes, and explain the plan and cost transparently in English.
After mapping, treatment usually takes about 15 to 30 minutes; numbing or cooling is used for sensitive areas such as palms and soles.
The visit itself is short, but the sweat-reducing effect builds over the following days rather than being immediate.
Most people notice clear reduction within about 1 to 2 weeks, holding for several months before a repeat is considered.
Because the effect wears off as nerves recover, sessions are repeated roughly every several months to maintain control.
Choose a clinic where doctors first diagnose the sweating area, rule out secondary causes, and map the zone with a starch-iodine test before injecting. Correct intradermal technique and per-area dosing matter more than any product. You can start on our botox injection page to see the approach.
Intradermal botulinum toxin type A is the mainstay in-clinic treatment for focal hyperhidrosis. Injected in a fine grid, it temporarily blocks the nerve signal that activates sweat glands, so the treated area sweats far less for months. It is non-surgical, does not remove glands, and is repeated when the effect fades.
The 3 most common focal areas are the armpits (axillary), palms, and soles, and each can be treated individually. Facial or scalp sweating can also be assessed. Because each area needs different dosing and injection points, the clinic’s doctors plan per area at consultation rather than applying one fixed dose everywhere.
Underarm injections are usually well tolerated with brief stings, while palms and soles are more sensitive and are managed with numbing cream, cooling, or a nerve block. Most sessions take about 15 to 30 minutes. Your doctor tailors comfort measures to the area so treatment stays as comfortable as possible.
Downtime is minimal for most people, and you can return to light daily activity the same day. Some redness or small bumps at injection points settle within hours. Heavy exercise, saunas, and heat are usually avoided briefly. Your doctor gives specific aftercare based on which areas were treated.
Sweat reduction builds over a few days and typically peaks within about 1 to 2 weeks after treatment, not immediately. This is because the toxin gradually blocks the nerve signal to sweat glands. If any small area still sweats, your doctor can review and top up at a follow-up visit.
Results commonly last around 4 to 9 months per session, though this varies by person and area treated. Underarm results often last toward the longer end, while palms and soles can be shorter. When sweating gradually returns as nerves recover, the session is simply repeated to maintain control.
Hyperhidrosis is managed rather than fixed once, so treatment is repeated roughly every several months as the effect fades. Many people settle into a comfortable rhythm of 1 to 2 sessions a year per area. Your doctor tracks how long results hold for you and plans repeats accordingly.
Yes, sweating treatment is area-specific and can sit alongside other aesthetic plans without overlap. Some patients also explore energy-based options for underarms. You can compare related injectable approaches on our injection treatment page. Your doctor sequences everything so nothing competes on the same day.
Randomized trials report that intradermal botulinum toxin type A is well tolerated for focal hyperhidrosis, with side effects usually mild and temporary. A proper consultation screens for contraindications such as pregnancy or neuromuscular conditions. You can read more about how it is used on our botox injection page.
Most side effects are mild and short-lived, such as injection-site redness, small bruises, or brief tenderness. For palms, temporary mild hand-grip weakness can occur but usually resolves. Compensatory sweating elsewhere is uncommon with focal treatment. Your doctor reviews your history first to keep risks low and explains what to expect.
Prescription antiperspirants are a reasonable first at-home step for milder sweating but need continuous daily use and can irritate skin. Intradermal botulinum toxin instead gives months of reduction per session by targeting the nerve signal. Your doctor helps you decide which fits your severity and lifestyle at consultation.
Avoid rubbing the treated area, intense heat, saunas, and heavy exercise for the rest of the day, and keep the skin clean. Normal activity resumes quickly for most people. Following this aftercare helps the toxin settle evenly. A gentle skin care routine keeps treated skin comfortable afterwards.
Most adults with focal armpit, palm, or sole sweating that affects daily life are suitable candidates once secondary causes are excluded. Pregnancy, breastfeeding, and some neuromuscular conditions are contraindications. A consultation on our botox injection page confirms your suitability and sets a plan matched to your pattern.
A single visit of 1 to 2 days is usually enough, since mapping and injection take about 15 to 30 minutes and downtime is minimal. Because results build over 1 to 2 weeks, many international patients fly home afterwards. Our English-speaking team helps you coordinate timing around your trip.
Yes, flying within a day or so is generally fine because the treatment is non-surgical with minimal downtime. Keep treated areas clean and avoid excessive heat while travelling. If your palms or soles were treated, your doctor will advise on comfort during and after the flight.
International patients can be reviewed remotely in English between visits, and repeat sessions are simply timed to your next trip to Seoul. Your treatment map and dosing are kept on file for continuity. You can plan the approach in advance on our botox injection page.
| Intradermal Botulinum Toxin | Prescription Antiperspirant | Energy Device (e.g. microwave/RF) | |
|---|---|---|---|
| Mechanism | Temporarily blocks the nerve signal to sweat glands | Topically plugs or reduces sweat-duct output | Heats and reduces sweat-gland activity in the skin |
| Best for | Focal armpit, palm, or sole sweating wanting months of relief | Mild sweating or as a first-line at-home step | Underarm sweating seeking a longer-lasting reduction |
| Pain / comfort | Brief injections; numbing or cooling used for palms and soles | None, but can irritate the skin | Requires local anaesthetic; more involved session |
| Downtime | Minimal; light activity same day | None | Some swelling or tenderness for a period after |
| Results timeline | Builds over days, holds for months, then repeated | Ongoing daily use needed | Reduction can be longer-lasting per session |
| Cost context | Depends on area and number of injection points | Lower per-item but continuous | Typically a higher per-session investment |
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