How does Botox help with excessive sweating?

Botulinum toxin blocks the chemical signals from the nerves that stimulate sweat glands, reducing the amount of sweat produced.

How long does it last?

Most patients enjoy dryness for 4 to 6 months, and some report benefits lasting up to 9 months.

Is it safe to block sweating?

Yes – the treatment only affects localized sweat glands. Your body will still regulate temperature using other areas.

How long does Botox for hyperhidrosis last?

Botulinum toxin for hyperhidrosis (excessive sweating) lasts between 6 to 9 months — significantly longer than facial Botulinum toxin. The sweat glands in the armpits have lower activity frequency than facial muscles, so the toxin is metabolised more slowly. Most patients need only 1 to 2 treatments per year.

How much does Botox for hyperhidrosis cost in Lisbon?

The cost of Botulinum toxin for hyperhidrosis in Lisbon varies depending on the area treated and the amount of toxin required. At Cosmo Clinic, pricing is confirmed after a free assessment where the doctor evaluates the severity of sweating and determines the appropriate dose.

Where can Botox for excessive sweating be applied?

Botulinum toxin for hyperhidrosis can be applied to the armpits (most common), palms of the hands, soles of the feet, and forehead. Each area requires a specific technique and dosage. Axillary hyperhidrosis (armpits) is the most frequently treated area with the strongest clinical evidence.

Home Treatments Hyperhidrosis botox

Hyperhidrosis botulinum toxin

Q: Is the treatment painful?

Mild discomfort may be felt, especially in sensitive areas like the palms. A numbing cream can be used to ease the sensation.

€29930 min

Cosmo Clinic Team

Masseter Botox is an FDA-approved treatment used to reduce excessive sweating in areas such as the underarms, palms, feet, or forehead. The procedure involves injecting botulinum toxin into overactive sweat glands, temporarily blocking the nerve signals that trigger sweating. It is highly effective, safe, and minimally invasive.

At Cosmo Clinic in Lisbon, masseter treatment is approached from both a functional and aesthetic perspective. Our doctors assess jaw muscle size, bite patterns, and patient history before recommending dosage. Full results develop over four to six weeks as the muscle responds to treatment.

Book a free first consultation with one of our English-speaking doctors at Cosmo Clinic to discuss whether masseter botulinum toxin is right for you.

Results

Significant reduction in sweating in treated areas.

Improved comfort and confidence in daily life.

Results noticeable within 3–7 days, lasting 4–6 months or longer.

Non-surgical, fast, and discreet treatment.

Key Features

Non-invasive: no incisions, no recovery time.

Quick session: 20–30 minutes.

Suitable for both men and women.

Effective for underarms, palms, feet, or face.

FAQ

How does masseter Botox work?

Botulinum toxin is injected directly into the masseter muscle, reducing its contraction force. For bruxism: relieves morning jaw pain and reduces teeth grinding. For aesthetics: the muscle gradually atrophies over 3–4 weeks, slimming and defining the jawline.

Is the treatment painful?

Minimal discomfort. The masseter is a thick muscle and the 30G needle causes only a brief sting. Most patients do not require topical anaesthetic.

When will I see results?

For bruxism relief: 3 to 5 days. For jawline slimming: 3 to 4 weeks, as the muscle gradually reduces in volume with reduced use.

How long does masseter Botox last?

Between 4 and 6 months for bruxism. For jawline slimming, many patients report 5 to 7 months. With regular maintenance, the effect can extend to 8 months.

Can I combine it with other treatments?

Yes. It is frequently combined with jawline filler or nose filler in facial harmonisation protocols. Your doctor will assess the best combination at your free consultation.

How much does masseter Botox cost in Lisbon?

At Cosmo Clinic, treatment starts from €299. The exact price is confirmed at your free consultation, after the doctor assesses muscle size and the appropriate protocol.

Does masseter Botox treat bruxism (teeth grinding)?

Yes. Reducing masseter muscle force decreases nocturnal grinding, relieves morning jaw pain, and reduces dental wear. For moderate to severe bruxism, it is one of the most effective non-surgical approaches available.

Are there any contraindications?

The standard contraindications for botulinum toxin apply: pregnancy, breastfeeding, neuromuscular disorders (e.g. myasthenia gravis), documented allergy to the toxin or albumin, and active infection at the injection site. We assess all of these at your consultation.

What is hyperhidrosis Botox

Masseter Botox is a medical application of botulinum toxin type A designed to reduce excessive sweating in specific areas of the body, most commonly the underarms, hands, feet, or forehead. The toxin temporarily blocks the nerve signals that activate the sweat glands, effectively halting perspiration in the treated zone. It is one of the most extensively studied and clinically validated uses of botulinum toxin in both aesthetic and dermatological medicine.

Who is it for

Indicated for people with focal hyperhidrosis, persistent, localised excessive sweating in the underarms, hands, feet, or forehead, that interferes with daily comfort, professional life, or wardrobe choices. Not recommended during pregnancy, breastfeeding, in neuromuscular disorders, or with active infection in the target zone. A medical assessment confirms suitability before treatment begins.

What to expect from the session

The session opens with a clinical consultation to identify the affected zone and the degree of sweating. In some cases, an iodine-starch test is used to map the sweat pattern precisely. The toxin is then distributed across multiple injection points with a microneedle. Underarm treatment takes around 30 minutes; for hands or feet, a topical anaesthetic cream may be applied beforehand. No hospital stay is required.

Results timeline

A noticeable reduction in sweating begins between day 3 and day 5. Full effect is reached 10 to 14 days after treatment. In the underarms, results typically last 6 to 9 months, sometimes extending to 12. For hands and feet, duration is 4 to 6 months. A follow-up assessment takes place at day 14.

Aftercare

For the first 24 to 48 hours, avoid intense physical activity, saunas, and very hot baths. After underarm treatment, hold off on strong antiperspirant deodorants for the first 24 hours. For hands and feet, keep the skin clean and avoid excessive friction. Return to social and professional life is immediate.

Why Cosmo Clinic

Cosmo Clinic in Lisbon follows rigorous medical protocols for hyperhidrosis treatment: clinical diagnosis, precise mapping of the affected area, and a calibrated dose that reduces sweating without unwanted effects. Consultations are available in Portuguese and English, with follow-up support after the session to ensure results perform as intended.

Hyperhidrosis botulinum toxin

Results

Key Features