Hyperhidrosis: Excessive Sweating — Treatment and Costs

Sweating is a vital bodily function — it regulates body temperature and protects against overheating. But for millions of people, sweating is far more than a normal physiological response: it is a daily burden that significantly restricts life. Hyperhidrosis — the medical term for excessive sweating — affects an estimated two to three percent of the population and remains widely underdiagnosed and undertreated. Good news: hyperhidrosis is treatable. From specialised antiperspirants to the highly effective Botox treatment and modern technologies such as miraDry microwave therapy, effective minimally invasive options are available today that can fundamentally change the lives of those affected.

What Is Hyperhidrosis?

Hyperhidrosis refers to pathologically elevated sweat production that exceeds what is physiologically necessary. While the human body normally produces about 0.5 to 1.5 litres of sweat per day, people with hyperhidrosis can produce many times this amount — without sufficient temperature change or physical exertion as a trigger.

The human body has two to four million sweat glands distributed across the entire skin. There are two types:

Eccrine sweat glands: Found everywhere on the body surface, most densely on palms, soles and in the armpits. They produce a water-based, clear sweat primarily serving thermoregulation. In hyperhidrosis, these glands are predominantly affected.
Apocrine sweat glands: Found mainly in the armpits, groin and anogenital region. Their secretion is thicker and is converted into characteristic body odour by skin bacteria.

Sweat production is controlled by the autonomic nervous system — specifically the sympathetic nervous system — via cholinergic nerve fibres using acetylcholine as a messenger. In hyperhidrosis, these fibres are overactive without physiological need. This is exactly where Botox treatment intervenes: botulinum toxin blocks acetylcholine release, interrupting the excessive signal cascade.

Primary and Secondary Hyperhidrosis

Primary (Idiopathic) Hyperhidrosis

Primary hyperhidrosis is the more common form and occurs without any detectable underlying organic disease. Key characteristics include:

Onset usually in childhood, adolescence or early adulthood (often between ages 14 and 25)
Predominantly focal — limited to specific body areas
Symmetrical presentation (both hands, both feet, both armpits)
No sweating during sleep (an important distinguishing feature)
Worsening with emotional stress, nervousness or excitement
Family history positive in up to 65% of cases

Secondary (Generalised) Hyperhidrosis

Secondary hyperhidrosis is a consequence of an underlying condition or medication. Possible causes include:

Endocrine disorders: Hyperthyroidism, diabetes mellitus, phaeochromocytoma
Neurological conditions: Parkinson's disease, autonomic neuropathy
Malignancies: Lymphomas, leukaemias
Medications: Antidepressants (SSRIs, SNRIs), antihypertensives, opioids
Hormonal changes: Menopause, pregnancy

Botox Treatment for Hyperhidrosis

Treatment with botulinum toxin A (Botox) is today considered one of the most effective and best-studied procedures for focal hyperhidrosis. In Germany, Botox is officially approved for axillary hyperhidrosis when antiperspirants have not worked sufficiently. For other body areas (hands, feet, face), treatment is performed off-label but is medically recognised.

How Does Botox Block Sweating?

Botulinum toxin type A blocks the release of acetylcholine at the cholinergic nerve endings that innervate the eccrine sweat glands. Without the acetylcholine signal, the gland cells can no longer initiate sweat production. The result: a drastic reduction in sweat secretion in the treated area for several months. Botox does not destroy the sweat glands — the effect is fully reversible.

Treatment Procedure

Cleaning: The skin is cleaned and disinfected.
Optional anaesthesia: A numbing cream (EMLA) or nerve block may be used for sensitive patients or hand/foot treatments.
Minor test: The treatment area is marked using the iodine-starch test.
Injections: Botulinum toxin is injected intradermally in a grid pattern (approx. 1 to 1.5 cm apart). Per armpit, typically 50 units are distributed across 10 to 20 injection points. Each armpit takes 5 to 10 minutes.
Post-treatment: No special aftercare is required; patients can leave shortly after.

Onset and Duration of Effect

First changes are noticeable after 3 to 7 days; the full result shows after 10 to 14 days, with sweat production typically reduced by 80 to 90% in the treated area. Duration for axillary hyperhidrosis: 6 to 12 months on average. For hands and feet: 4 to 6 months.

Iontophoresis

Iontophoresis is a non-invasive physical treatment method particularly suitable for palmoplantar hyperhidrosis. Hands or feet are immersed in water-filled trays through which a weak direct current (1 to 20 mA) is passed. Success rate: 70 to 90%. Home devices are available and are often reimbursed by statutory health insurance with a medical prescription.

miraDry Microwave Therapy

miraDry is a modern non-surgical method that permanently reduces axillary hyperhidrosis. Focused microwave energy (5.8 GHz) irreversibly destroys the sweat glands via thermalysis. Treatment takes 60 to 90 minutes under local anaesthesia. Most patients achieve a 60 to 80% long-term reduction in sweating from a single session. Cost: 1,500 to 3,000 EUR per session.

Costs at a Glance

Botox (both armpits): 400 to 800 EUR per session; repeat every 6 to 12 months
Botox (hands/feet): 500 to 900 EUR per session; repeat every 4 to 6 months
Botox (face/forehead): 300 to 500 EUR per session; repeat every 4 to 8 months
Iontophoresis (practice): 30 to 60 EUR per session
Iontophoresis (home device): 300 to 600 EUR one-off (often reimbursed by statutory insurance)
miraDry: 1,500 to 3,000 EUR per session
Subcutaneous curettage: 1,500 to 3,500 EUR (both armpits, permanent)

Insurance Coverage

Botox for axillary hyperhidrosis is approved and many statutory health insurers reimburse the treatment when antiperspirants have proven insufficient and medical documentation (HDSS assessment, Minor test results) is provided. Iontophoresis home devices can be prescribed as medical aids. miraDry, laser and ETS are generally self-pay. Private insurers typically provide broader reimbursement — request written confirmation before treatment.

Frequently Asked Questions

What Is the Most Effective Treatment for Armpit Sweating?

Botox is the first-line treatment for axillary hyperhidrosis after antiperspirants have failed. It reduces sweating by 80 to 90% and is approved in Germany for this indication. miraDry offers permanent reduction but at higher cost. Subcutaneous curettage is an excellent option for those seeking a permanent solution without the risks of ETS surgery.

Is Hyperhidrosis Treatment Covered by Health Insurance?

Statutory insurers may reimburse Botox for axillary hyperhidrosis and iontophoresis devices. Document prior treatment attempts, obtain an HDSS assessment from your doctor and apply for coverage before treatment. Private insurers typically provide more comprehensive coverage.

Does Botox for Hyperhidrosis Affect Athletic Performance?

No. The sweat glands in the armpits make up only about 1 to 2% of all sweat glands. Body temperature regulation continues effectively through the many other sweat glands across the rest of the body. Avoid intense sport for 24 to 48 hours after treatment.