Gangnam
Dr. Yoongon Ryu
Aesthetic Medicine Specialist
Flagship clinic · KOL for leading lifting & regenerative devices
Botox injections block the nerve signal that switches on sweat glands, reducing excessive underarm sweating for roughly 6 to 12 months.
Hyperhidrosis treatment with botox blocks the nerve signal that triggers sweat glands, dramatically reducing excessive underarm, palm, or facial sweating. A short series of tiny injections takes about 15 to 30 minutes, needs almost no downtime, and keeps sweating in check for roughly 6 to 12 months.
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Hyperhidrosis is excessive sweating beyond what the body needs to cool itself, most often in the underarms, palms, soles, or face. Botox treatment manages it by temporarily switching off the chemical messenger that tells your sweat glands to activate, so the treated area stays markedly drier without affecting the rest of your body.
During treatment, a series of very fine injections is placed just under the skin across the affected zone. The botulinum toxin blocks acetylcholine release at the sweat-gland nerve endings, which is why sweating in that area drops sharply within a few days to two weeks. It does not cure hyperhidrosis, but it controls it for months at a time.
At Reberry Clinic, treatment is planned and performed by the clinic’s doctors, with English-speaking support for international patients across three Seoul-area locations (Gangnam, Myeongdong, Incheon Airport). The team maps the sweating area first so injections are placed where they will help most.
Sweating is controlled by the sympathetic nervous system, which uses the neurotransmitter acetylcholine to signal eccrine sweat glands. Botulinum toxin type A binds at these nerve terminals and prevents acetylcholine from being released, so the chemical ‘on switch’ for the gland is interrupted. The glands themselves are unharmed; they simply stop receiving the signal to produce sweat. Because the blockade is local and temporary, only the injected area is affected, and normal nerve function gradually returns over several months as new nerve terminals form. A starch-iodine (Minor’s) test is often used to map the most active sweating zones before injection, improving precision.
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The doctor identifies the most active sweat zones, sometimes using a starch-iodine test, then marks an even grid of about 1 to 2 cm spacing.
Topical anaesthetic or cooling is applied; for sensitive areas like palms this step takes about 20 to 30 minutes.
Around 10 to 20 tiny intradermal injections per underarm distribute the botox evenly across the treatment area.
Over the next 2 to 14 days the toxin blocks acetylcholine, so sweat output in the area drops sharply.
Effect lasts roughly 6 to 12 months in the underarms and around 4 to 6 months in palms before a repeat session.
See representative outcomes from Reberry Clinic. Results build gradually and vary by individual; your plan is assessed at consultation.
The clinic’s doctors confirm the diagnosis, identify the sweating zones, and explain expected results in English.
After numbing, around 10 to 20 micro-injections per area take about 15 to 30 minutes in total.
You can leave straight away and resume normal activities, including a flight, the same day.
Sweating drops noticeably within 2 to 14 days as the nerve signal is blocked.
Dryness lasts roughly 6 to 12 months underarms; avoid heat and heavy exercise for 24 hours after.
It is a series of tiny injections that block the nerve signal telling your sweat glands to activate, sharply reducing excessive sweating in the treated area. The botox does not harm the glands; it simply pauses the chemical messenger. You can learn how the same injectable is used on our botox injection page.
Very effective for focal sweating: a landmark trial found 94% of treated patients responded at 4 weeks, and real-world studies report sweat reductions of 80% or more in the underarms. Results vary by area and dose, with palms and face sometimes needing more careful technique than underarms do.
Adults with primary focal hyperhidrosis of the underarms, palms, soles, or face who have not responded well to antiperspirants are good candidates. A consultation confirms the diagnosis and rules out medical causes. You can review the broader range of injectable options on our injection treatment page.
Most patients feel brief stings from the fine needles, which is very manageable in the underarms. For sensitive areas like palms, numbing cream, cooling, or a nerve block is used to keep you comfortable. The whole session is short, and any soreness settles quickly afterwards with no lasting pain.
Downtime is minimal and most patients return to normal activities the same day. You may notice tiny injection marks or slight redness for a few hours. Because there are no dressings or restrictions beyond avoiding heat for a day, international visitors can usually continue their trip right away.
Sweating typically drops within 2 to 14 days as the nerve signal is blocked, with the full effect by around two weeks. It is not instant, so plan ahead if you have an event. If a small area still sweats, your doctor can review and top it up at a follow-up visit.
For underarm sweating the effect commonly lasts about 6 to 12 months, while palms and face often last around 4 to 6 months. Duration varies with dose and personal metabolism. Many patients schedule a repeat once they notice sweating returning, since the treatment is fully repeatable.
One session usually controls a treatment area, and the procedure is simply repeated when the effect fades. Some patients return roughly once or twice a year for underarms. Your doctor sets the dose and timing at consultation based on the area and how strongly you sweat.
Yes, hyperhidrosis injections are area-specific and can be scheduled alongside other facial or skin treatments without conflict, sequenced safely by your doctor. Many international patients combine appointments in one visit. You can browse complementary options through our injection treatment page to plan an efficient trip.
Hyperhidrosis injections have a long, well-documented safety record when performed by trained doctors, with effects confined to the injected area. Side effects are usually minor and temporary. Your doctor reviews your medical history first, since conditions such as neuromuscular disorders or pregnancy mean the treatment is not suitable for everyone.
Expect minor injection-site redness, small bruises, or brief tenderness that resolve quickly. In palms, temporary mild hand weakness can occur and fades within weeks. Compensatory sweating elsewhere is uncommon with focal botox. Serious effects are rare when an experienced doctor uses correct doses and placement.
Aftercare is simple: avoid intense heat, saunas, and heavy exercise for about 24 hours, and do not rub the treated area that day. There are no dressings to manage. Your clinic provides written guidance so you can follow it confidently, even after you have travelled home.
Antiperspirants only plug ducts while used daily and may irritate skin, whereas botox blocks the sweat signal for months from one session, as explained on our botox injection page. Surgery is more invasive and permanent, so botox offers a low-downtime middle path.
A single session needs only a day, since treatment takes 15 to 30 minutes with no real downtime. Many international patients combine it with other care in the same visit, drawing from options on our injection treatment page. Our English-speaking team coordinates timing to fit a short trip.
Yes, flying the same day is generally fine because the procedure is non-invasive with negligible swelling. Stay hydrated and avoid intense heat on travel day. If you treated palms, allow any brief tenderness to settle before a long trip. Your doctor will flag any specific advice before you leave.
International patients can have remote check-ins in English to review how well sweating is controlled and when to repeat. If you want to add other care on a later visit, you can explore our skin care options. Your treatment notes and dose are kept on file for any return appointment.
| Botox injection | Microwave thermolysis | Prescription antiperspirant | |
|---|---|---|---|
| Mechanism | Blocks the nerve signal to sweat glands | Heat energy destroys sweat glands | Aluminium salts plug sweat ducts |
| Best for | Underarm, palm, or facial focal sweating | Underarm sweating seeking longer-term reduction | Mild cases or first-line at-home control |
| Pain / comfort | Brief stings from fine needles | Numbing needed, some soreness after | Possible skin irritation |
| Downtime | Minimal, resume activities same day | Mild swelling or tenderness for days | None |
| Results timeline | Drier within 2 to 14 days | Builds over weeks | Gradual with daily use |
| Longevity | Around 6 to 12 months underarms | Often long-lasting, may need a top-up | Only while used regularly |
| Sessions | Repeat as the effect wears off | Usually 1 to 2 sessions | Ongoing daily use |
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