Can Botox Treat Excessive Sweating? What Patients Should Know

Written by the Sakura Skin team. Medically reviewed by Bethany S. Campbell, JD, RN, Sakura Skin Medical Spa, Fenton & Flint, MI. Published August 28, 2026. Last updated August 28, 2026.

Short answer: Yes. Botox is FDA-approved for severe primary axillary hyperhidrosis — excessive underarm sweating that has not responded to prescription antiperspirants. It works by blocking the nerve signal that tells sweat glands to switch on. Most people notice a difference within two weeks, and results typically last four to six months. Treatment of the hands, feet, or face for sweating is off-label but commonly done.

Excessive sweating can make everyday activities—such as shaking hands, giving a presentation, or wearing certain clothes—unnecessarily stressful. When prescription antiperspirants and other treatments do not provide enough relief, Botox may offer a temporary but effective option. Botox is best known for smoothing wrinkles, but it can also reduce sweating by interrupting the nerve signals that activate sweat glands. Here is what patients should know about Botox for hyperhidrosis, including how it works, its benefits, risks, and what to expect during treatment.

What Is Hyperhidrosis?

Hyperhidrosis is excessive sweating that occurs beyond what the body needs for temperature regulation. It may affect one or more areas, including:

• Underarms, also called axillary hyperhidrosis
• Palms of the hands
• Soles of the feet
• Face and scalp
• Groin or other localized areas

The condition may be primary focal hyperhidrosis, which often begins in childhood or adolescence and has no identifiable medical cause. It can also be secondary hyperhidrosis, which may result from a medication, hormonal change, infection, neurological condition, or another health problem. A sudden change in sweating, night sweats, or sweating throughout the body should be assessed by a qualified healthcare professional before cosmetic or procedural treatment is considered.

How Does Botox Treat Excessive Sweating?

Botox is a purified form of botulinum toxin type A. When injected into the skin, it temporarily blocks the release of acetylcholine, a chemical messenger involved in activating sweat glands. As a result, the treated glands produce significantly less sweat. Botox does not remove the sweat glands, and it does not permanently change the body’s ability to sweat. The effect gradually wears off as nerve activity returns. The U.S. Food and Drug Administration (FDA) has approved Botox for severe primary axillary hyperhidrosis that is not adequately managed with topical treatments. Physicians may also use it in other areas, such as the hands or feet, when clinically appropriate; these uses may be considered off-label depending on the location and local regulations.

How Effective Is Botox for Hyperhidrosis?

Clinical studies have found that Botox can substantially reduce underarm sweating for many patients. The [International Hyperhidrosis Society](https://www.sweathelp.org/) reports that treatment may reduce underarm sweating by approximately 82% to 87% in appropriate patients. Results vary according to the treatment area, dosage, injection technique, and individual response. Many patients notice improvement within a few days, with the full effect often developing within about two weeks. Botox may help patients:

• Sweat less during work, exercise, or social situations
• Reduce visible underarm marks on clothing
• Feel more comfortable in professional and personal settings
• Improve confidence and quality of life

It is not a permanent cure, and it may not eliminate sweating completely. The goal is usually meaningful reduction rather than total dryness.

How Long Does Botox for Sweating Last?

The results commonly last about four to six months for underarm treatment, although some patients experience relief for longer. The [American Academy of Dermatology](https://www.aad.org/public/diseases/a-z/hyperhidrosis-treatment) notes that repeat treatment may be needed when sweating returns. Duration can differ by body area. Palms and feet may respond differently from underarms, and follow-up appointments help determine when another treatment is appropriate.

What Happens During Treatment?

A clinician first reviews the patient’s symptoms, medical history, medications, and previous treatments. They may use the starch-iodine test or another assessment to identify the areas of excessive sweating. During the procedure:

1. The treatment area is cleaned and marked.
2. A series of small Botox injections is placed into the affected skin.
3. A topical anesthetic, ice, vibration, or another comfort measure may be offered, particularly for the palms or feet.
4. Patients typically return home the same day.

Underarm treatment often takes approximately 20 to 30 minutes, although timing varies. Most people resume normal activities soon afterward, subject to their clinician’s instructions.

Possible Side Effects and Risks

Botox injections are generally well tolerated when performed by an appropriately trained medical professional. Temporary side effects may include:

• Pain, stinging, bruising, or redness at injection sites
• Mild swelling or tenderness
• Headache or flu-like symptoms
• Temporary weakness in nearby muscles

In the hands, Botox can sometimes cause temporary weakness that affects grip. Treatment of the feet may be uncomfortable and can occasionally make walking difficult for a short period. Rare but serious reactions can include trouble swallowing, breathing difficulty, widespread muscle weakness, or an allergic reaction. Patients should seek urgent medical attention if these symptoms occur. The FDA advises patients to receive botulinum toxin from a licensed and trained healthcare professional and to discuss the product’s risks and benefits before treatment. Botox should not be injected into an area with an active infection, and patients should disclose neuromuscular disorders, pregnancy or breastfeeding, allergies, and all medications or supplements.

Who May Be a Good Candidate?

Botox may be appropriate for adults with diagnosed focal hyperhidrosis when conservative measures have not worked well enough. A clinician may consider it when sweating is:

• Frequent or difficult to control
• Limited to specific areas
• Disruptive to work, school, relationships, or daily life
• Unresponsive or intolerant to prescription antiperspirants or other therapies

A medical evaluation is important because excessive sweating can sometimes signal an underlying condition. Botox may not be suitable for everyone, including some people with certain neuromuscular conditions or those taking medications that affect nerve or muscle function.

How Does Botox Compare With Other Treatments?

Botox is one option in a broader hyperhidrosis treatment plan. Depending on the cause and affected area, alternatives may include:

• Aluminum chloride antiperspirants: Often an initial treatment for localized sweating
• Prescription topical medicines: Certain wipes or creams may help underarm or facial sweating
• Oral medications: Anticholinergic drugs can reduce sweating but may cause dry mouth, blurred vision, constipation, or other side effects
• Iontophoresis: A device uses a mild electrical current to treat sweaty hands or feet
• Microwave or energy-based treatments: Some procedures target underarm sweat glands
• Surgery: Procedures such as sympathectomy are reserved for selected severe cases because they carry important risks, including compensatory sweating

A dermatologist or other qualified clinician can help compare effectiveness, side effects, cost, and convenience.

What Does Botox for Sweating Cost?

The price depends on the treatment area, number of units used, provider experience, location, and whether insurance covers the procedure. Because treatment is temporary, patients should consider the ongoing cost of maintenance sessions. Insurance coverage varies. Some plans require documentation of a confirmed diagnosis and failure of less expensive treatments before approving Botox for severe primary axillary hyperhidrosis. Patients should contact their insurer and ask the provider about expected out-of-pocket costs before scheduling treatment.

Questions to Ask Your Provider

Before treatment, consider asking:

• Is my sweating primary hyperhidrosis or a symptom of another condition?
• Is Botox FDA-approved for the area being treated?
• How much improvement is realistic for me?
• How long might the results last?
• What side effects are most likely in this treatment area?
• Who will perform the injections, and how experienced are they with hyperhidrosis?
• Will my health insurance cover the procedure?
• What alternatives should I consider?

Key Takeaways

Botox can be an effective treatment for severe localized sweating, particularly underarm hyperhidrosis that has not responded adequately to topical therapy. It works by temporarily blocking the nerve signals that stimulate sweat glands, and many patients experience substantial relief for several months. However, Botox is not a permanent cure and is not appropriate for every patient or every cause of sweating. A proper diagnosis, discussion of alternatives, and treatment by a qualified medical professional are essential. To learn more about hyperhidrosis treatment options, review guidance from the [FDA](https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/botulinum-toxin-products) and the [American Academy of Dermatology](https://www.aad.org/public/diseases/a-z/hyperhidrosis-treatment).

Talk to Us About Excessive Sweating

Sakura Skin is a physician-led medical spa with locations at 13389 Pomona Drive in Fenton, MI and 2335 S. Linden Road, Suite B in Flint, MI. We see patients from across Genesee and Livingston counties — Fenton, Flint, Linden, Holly, Grand Blanc, Swartz Creek, Davison, and Hartland.

If antiperspirants have not worked and you are planning your clothing around it, that is worth a conversation. We will go through your history, what you have already tried, and whether treatment makes sense. Unlike cosmetic treatment, hyperhidrosis is sometimes covered by insurance — worth checking with your plan before you assume it is not.

Ready to ask about it? Call 810-394-2187 or Text 810-512-2496 — or book online at calendly.com/sakuraskin. We’re in Fenton and Flint, MI.

Individual results vary. Botox is FDA-approved for severe primary axillary hyperhidrosis in adults inadequately managed by topical agents; treatment of other areas for sweating is off-label. Suitability and dosing are determined by your medical provider after an in-person evaluation. This article is for general information and is not medical advice.