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Stay dry, stay confident.
Excessive underarm sweating can soak through clothing, interrupt your day, and affect your confidence, no matter how often you reach for antiperspirant. At Renew MedSpa, Botox injections offer a simple, proven way to dramatically reduce underarm sweat for months at a time.
Hyperhidrosis is a medical condition where the body sweats far more than it needs to for temperature control. It commonly affects the underarms, where overactive nerves signal the sweat glands to keep producing sweat even when your body does not need to cool down. For many people it begins in adolescence and continues for years, and no amount of clinical antiperspirant fully solves it.
If you have tried every antiperspirant and still deal with soaked shirts, the problem is not your routine. It is overactive sweat signaling, and it is treatable.
The good news is that excessive underarm sweating responds remarkably well to a quick in-office treatment. Botox injections calm the overactive nerves that drive the sweat glands, reducing underarm sweat dramatically for months at a time. At your appointment we assess the area and treat it the same day.
What causes excessive sweating
Why it happens
- Overactive nerve signals: in hyperhidrosis, the nerves that tell sweat glands to activate are overactive, triggering sweat the body does not need.
- Genetics: primary focal hyperhidrosis, the most common type for underarms, often runs in families and tends to begin in childhood or adolescence.
- Triggers: heat, stress, anxiety, and certain foods can intensify episodes, though the underlying tendency is always present.
- Underlying conditions: less commonly, generalized sweating can stem from a medical condition or medication rather than primary hyperhidrosis.
The signs you may notice
- Visible sweat that soaks through shirts, even in cool conditions.
- Frequent wardrobe changes or choosing clothing to hide sweat marks.
- Social or work discomfort, from handshakes to presentations.
- Skin irritation from constant underarm moisture.
Botox treats the symptom of excessive sweating. It does not diagnose or treat any underlying medical cause. If your sweating is generalized rather than focused on the underarms, or started suddenly, we recommend speaking with your physician about the cause.
Botox for Underarm Hyperhidrosis
For excessive underarm sweating, Botox is the treatment we reach for. It is FDA approved for underarm hyperhidrosis and is one of the most reliable, satisfying treatments in aesthetics, with patient satisfaction reported up to 98 percent.
Botox works by blocking the nerve signals that tell your sweat glands to overproduce. A series of tiny injections across each underarm calms that overactive signaling, so the glands sweat far less. The treatment takes about an hour with numbing cream for comfort, and most people notice results within two to five days, with full results by two weeks. For most patients, the results last six to twelve months before a touch-up is needed.
Explore Botox for HyperhidrosisWhy Botox for sweating
- FDA approved for underarm hyperhidrosis
- Dramatically reduces underarm sweat at the source
- Patient satisfaction reported up to 98 percent
- Results in two to five days, full effect by two weeks
- Lasts six to twelve months between treatments
- Quick, in-office, with numbing for comfort
What to expect
Botox for hyperhidrosis is straightforward, and we will walk you through every step at your appointment.
The treatment
We cleanse and numb the underarms, then place a series of small injections across each side. The full visit takes about an hour, and most people report little to no discomfort.
See the full treatment →Before and after
Shave the underarms about 24 hours before, and skip deodorant the day of treatment. Afterward, avoid massaging the area for 24 hours, then return to your normal routine. We provide complete pre and post care guidance.
Review the details →Clearing up sweating myths
There is a lot of confusion about treating excessive sweating. Here is what is actually true.
A stronger antiperspirant will eventually fix it
For true hyperhidrosis, even clinical-strength antiperspirants often fall short, because the issue is overactive nerve signaling, not surface moisture. Botox addresses the signal itself, which is why it works when antiperspirants do not.
Stopping underarm sweat is unhealthy
The underarms are a small fraction of your body’s sweat glands, so treating them does not affect your ability to cool down. Your body continues to regulate temperature normally through the rest of your skin.
The injections are very painful
We apply numbing cream first, and the needles are very fine. Most patients report little to no discomfort, and the whole visit takes about an hour.
Results are permanent after one treatment
Results are long-lasting but not permanent. Most people enjoy six to twelve months of dryness before a touch-up. We will set honest expectations for your body at your appointment.
Hyperhidrosis FAQ
Botox blocks the nerve signals that tell your sweat glands to activate. By calming that overactive signaling in the underarms, it dramatically reduces sweat at the source. Learn more on our Botox for underarm hyperhidrosis page.
Most people notice a difference within two to five days, with full results by about two weeks. For most patients, results last six to twelve months before a touch-up is needed.
We apply numbing cream first and use very fine needles, so most patients report little to no discomfort. The full visit takes about an hour from start to finish.
The goal is to bring underarm sweat down to a normal, comfortable level, not to stop it entirely. You may still use deodorant or antiperspirant, but most people find their sweating is dramatically reduced.
Shave your underarms about 24 hours before, skip deodorant and antiperspirant the day of, and wear a dark, machine-washable top. We share complete instructions when you book. See the full guidance on our treatment page.
Simply book an appointment. We assess the area and, in most cases, treat it the same day, so there is no separate visit required. Book your appointment here.
Confidence, sweat-free
Excessive underarm sweating is highly treatable. Book an appointment and, in most cases, we assess and treat the same day.
