Gangnam
Dr. Yoongon Ryu
Aesthetic Medicine Specialist
Flagship clinic · KOL for leading lifting & regenerative devices
Underarm botox for excessive sweating typically reduces sweat production by around 80% to 90% within 2 to 7 days, with results lasting roughly 4 to 6 months per session.
Hyperhidrosis botox before and after shows a clear drop in underarm sweating, usually around 80% to 90% less, appearing within 2 to 7 days and lasting roughly 4 to 6 months. The treatment temporarily blocks the nerve signal to sweat glands, so dryness is gradual, not instant, and it repeats as the effect fades over time.
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Hyperhidrosis is excessive sweating beyond what the body needs to regulate temperature, most commonly affecting the underarms, palms and soles. For the underarms, a series of small botox injections is one of the most studied non-surgical options. The botulinum toxin temporarily blocks the chemical messenger (acetylcholine) that tells the sweat glands to activate, so the treated area sweats far less for several months.
A before and after comparison for hyperhidrosis is mostly about function rather than appearance: clothes stay dry, visible sweat marks fade, and many people feel more comfortable in social and work settings. Because the effect is temporary, it is not a one-time fix; the glands gradually regain activity and the treatment is repeated. This page explains what the change looks like, how fast it appears and what affects each person’s outcome.
Reberry Clinic is a Seoul dermatology clinic serving international patients with English-speaking support across three Seoul-area locations (Gangnam, Myeongdong, Incheon Airport). The clinic’s doctors assess the affected area, map the injection points and explain realistic expectations before any botox treatment.
Sweat glands are switched on by nerve endings that release acetylcholine. Botulinum toxin type A, the active agent in botox, binds at these nerve endings and temporarily prevents that release, so the sweat glands in the treated zone stay quiet. This is a local, reversible effect: only the injected area is affected, and the body still regulates temperature normally elsewhere. Nerve terminals slowly form new connections over months, which is why the result fades and the treatment is repeated.
For underarm hyperhidrosis, the doctor typically maps the sweating zone with a simple starch-iodine test, then places multiple shallow micro-injections a short distance apart so the toxin is evenly distributed. Reberry Clinic uses generic, regulated botulinum toxin and the clinic’s doctors decide the dose and injection grid based on the size and severity of your sweating. The same botox mechanism is also used for facial and muscle indications, but the technique and dosing for sweating are different.
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A doctor uses a starch-iodine test to mark exactly where the 2 underarms sweat most so injections target the active zone.
The active area is divided into a grid, usually around 10 to 20 points per underarm, spaced a short distance apart for even coverage.
A topical anaesthetic or cooling is applied for a few minutes to keep the multiple tiny injections comfortable.
Shallow micro-injections of regulated toxin are placed at each of the mapped points; the whole session usually takes about 15 to 20 minutes.
Sweating drops over the next 2 to 7 days; the clinic reviews your result and discusses repeating it in 4 to 6 months.
See representative outcomes from Reberry Clinic. Results build gradually and vary by individual; your plan is assessed at consultation.
An English-language consultation assesses the affected area, rules out causes that need different care and maps your sweating with a simple test.
After numbing, the doctor delivers the mapped micro-injections; the session usually takes about 15 to 20 minutes.
It is a single visit, so it fits a short Seoul trip; any repeat is in roughly 4 to 6 months.
Sweating drops noticeably within 2 to 7 days and reaches full effect in about 1 to 2 weeks.
Dryness typically lasts 4 to 6 months; avoid heavy exercise and heat for 24 hours and re-treat when sweating returns.
The change is mainly functional: clothing stays dry, visible underarm marks fade and staining drops, usually within 2 to 7 days. Most people experience around 80% to 90% less sweating in the treated area. The effect is temporary, so it is not a one-time fix, and the treatment is repeated as sweating returns.
Botox temporarily blocks acetylcholine, the chemical signal that tells your sweat glands to activate, so the treated underarm sweats far less for several months. Only the injected area is affected. The same regulated botox mechanism is mapped and dosed differently for sweating than for facial use.
Most people notice clearly less sweating within 2 to 7 days, with the full effect by about 1 to 2 weeks. It is gradual rather than instant because the toxin takes a few days to act on the nerve endings. Your doctor reviews your response and plans any repeat treatment from there.
Underarm results typically last about 4 to 6 months, after which sweating gradually returns and the treatment can be repeated. Duration varies with dose, the severity of your sweating and individual response. Because it is temporary, expectations are individualized at your botox consultation rather than promised as a fixed time.
It involves several shallow micro-injections, which feel like brief stings, but a topical anaesthetic or cooling makes it manageable for most people. The underarm session usually takes about 15 to 20 minutes. Comfort options are discussed beforehand so you know what to expect on the day.
Downtime is minimal; mild redness or small bumps at the injection points usually settle within a few hours, and most people resume normal activity the same day. Avoid intense exercise, saunas and heat for about 24 hours. This makes it practical to fit into a short Seoul itinerary.
The active sweating zone is mapped and divided into a grid, usually around 10 to 20 small injection points per underarm for even coverage. The exact number depends on the size of your sweating area, which the doctor measures with a simple starch-iodine test before treatment begins.
It is a single session for the treated area, with repeat treatment roughly every 4 to 6 months as the effect fades. You do not need to stack multiple sessions up front. The plan and timing are reviewed during the botox assessment based on how your sweating responds.
In randomized studies, around 94% of patients achieved at least a 50% reduction in sweat production, and many report roughly 80% to 90% less sweating in real terms. Effectiveness varies by individual and dose, which is why a plan is set during the botox assessment after reviewing the severity of your hyperhidrosis.
Underarm hyperhidrosis botox is usually used on its own for sweating, but you can discuss other concerns separately at the same visit. The clinic’s doctors will explain what can and cannot be combined safely. Other options are detailed alongside the botox treatment so you can plan one efficient appointment.
Botox gives months of reduction from one quick session, antiperspirants work only with nightly use, and microwave therapy aims for longer-lasting results but with more swelling and recovery. Each suits a different level of sweating and budget. Your doctor helps match the option to your needs at consultation.
Side effects are usually mild and temporary: brief redness, small bumps, tenderness or, rarely, slight compensatory sweating elsewhere. Serious effects are uncommon when the regulated toxin is dosed and placed correctly. The clinic reviews your medical history first and explains what to watch for, so care is individualized rather than presented as carrying no risk at all.
Aftercare is simple: avoid intense exercise, saunas, hot baths and heavy heat for about 24 hours, and do not rub the treated area firmly that day. Normal showering is fine. You receive written aftercare so international patients can follow it confidently after returning home.
Yes, Reberry Clinic serves international patients with English-speaking support across three Seoul-area locations, including one near Incheon Airport. You can be assessed and treated on your trip and supported afterward from abroad. Message us on WhatsApp to plan your visit and ask about timing.
Because it is a single short session, even a one-day visit works; the underarm treatment itself takes about 15 to 20 minutes after assessment. There is no required multi-day course. Our team helps schedule it around your itinerary and answers questions before you arrive in Seoul.
Yes, most people fly the same or next day because downtime is minimal and any redness settles quickly, while the sweat-reducing effect develops over the following days. You receive a written aftercare plan so you can follow up on your botox result from abroad.
| Hyperhidrosis Botox | Clinical Antiperspirants | Microwave Therapy | |
|---|---|---|---|
| Mechanism | Toxin temporarily blocks the nerve-to-gland signal | Aluminium salts plug sweat ducts at the surface | Microwave energy heats and reduces sweat glands |
| Best for | Moderate to severe underarm sweating wanting months of relief | Mild sweating or a low-cost first step | Those seeking a longer-lasting reduction |
| Onset | Within about 2 to 7 days | Days to weeks of nightly use | Often after one or two sessions |
| Comfort | Brief stings from several micro-injections | Can irritate the skin | Local anaesthetic; some swelling and soreness |
| Downtime | Little; resume normal activity the same day | None | Some swelling, tenderness for days |
| Duration | Typically about 4 to 6 months, then repeat | Only while used regularly | Aims to be longer-lasting |
| Cost context | Consultation-led; depends on area and dose | Low, over the counter | Consultation-led; usually higher per session |
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