Managing Excessive Sweating (Hyperhidrosis) with Botulinum Toxin

By Dr. Meg Minasian, Founder of The MW Clinic London

Excessive sweating — also known as hyperhidrosis — can have a profound impact on everyday life. It can interfere with confidence, clothing choices, and even professional or social interactions. While often under-recognised, hyperhidrosis is a genuine medical condition that affects millions of people and is not simply a matter of personal hygiene.

At The MW Clinic London, I offer botulinum toxin treatment as an effective, evidence-based solution for patients struggling with this condition.

What Is Hyperhidrosis?

Hyperhidrosis refers to abnormally increased sweating that goes beyond what is needed to regulate body temperature. It can affect various areas, most commonly the underarms, hands, feet, and face. For many individuals, the sweating is persistent, unpredictable, and unrelated to exercise or heat.

There are two main types:

• Primary focal hyperhidrosis – usually localised (e.g. underarms or palms) and often starts in adolescence.
• Secondary hyperhidrosis – caused by an underlying medical condition or medication and may be more generalised.

If you’re unsure which type you may have, a full medical consultation can help clarify the diagnosis.

How Can Botulinum Toxin Help?

Botulinum toxin type A (commonly known by brand names such as Botox® and Nuceiva®) works by temporarily blocking the nerve signals responsible for activating sweat glands. When injected into targeted areas, it dramatically reduces sweat production, often for several months at a time.

The treatment is:

• Clinically proven
• Safe, when performed by an experienced doctor
• Well tolerated, with minimal downtime
• Effective in reducing sweating by up to 80–90% in treated areas

What Areas Can Be Treated?

The most commonly treated areas include:

• Underarms (axillary hyperhidrosis) – particularly effective with long-lasting results
• Palms and soles – helpful but may involve more sensitivity during treatment
• Forehead and face – requires expert understanding of facial anatomy to avoid unwanted muscle weakness

Each area requires a carefully tailored approach depending on anatomy, severity, and patient goals.

What to Expect During Treatment

As with all treatments at The MW Clinic London, I begin with a comprehensive, 60-minute consultation to assess your medical history and confirm that this treatment is appropriate for you.

During the procedure, tiny amounts of botulinum toxin are injected just below the skin’s surface using a fine needle. The process typically takes 15–30 minutes depending on the area. Most patients find the procedure very tolerable, and numbing options are available if needed.

Results usually begin to appear within 3–7 days, with full effects seen at around 2 weeks. The benefits typically last for 4–7 months, though some patients experience longer relief.

Is It Safe?

Yes. Botulinum toxin has been extensively studied and safely used in both aesthetic and therapeutic settings for over 30 years. When treating hyperhidrosis, it is important that the injections are administered by a qualified medical professional who understands both the anatomy and the pharmacology of the product.

At The MW Clinic London, I personally perform every treatment — including those for hyperhidrosis — using medical-grade standards and precision.

The Psychological Impact of Treating Hyperhidrosis

Many patients report a significant improvement in quality of life following treatment. The ability to wear lighter colours, reduce daily stress about visible sweat, and enjoy everyday interactions more comfortably often leads to a meaningful boost in self-confidence and emotional wellbeing.

Summary

Hyperhidrosis is a medical condition that can be safely and effectively treated with botulinum toxin. If you’ve been struggling with excessive sweating that disrupts your life, there is no need to suffer in silence.

I’d be happy to discuss your symptoms in a dedicated consultation and help you explore whether this treatment may be right for you.