Medical Encyclopaedia › Hyperhidrosis (short definition)
In brief: In hyperhidrosis, a person sweats significantly more than would be necessary for temperature regulation. The armpits, hands, feet and face are particularly often affected. The condition is harmless but can be a major burden in everyday life.
Forms
Primary hyperhidrosis usually begins in childhood or adolescence, occurs on both sides at certain parts of the body and is not caused by any other disease; there is often a family predisposition. Secondary hyperhidrosis tends to affect the whole body and can be triggered by an overactive thyroid, diabetes, infections, the menopause or medicines.
Antiperspirants
The first choice is antiperspirants with high-dose aluminium salts, which are applied to dry skin in the evening and temporarily close the openings of the sweat glands. Skin irritation can occur at first.
Other treatments
For heavy sweating of the hands and feet, tap water iontophoresis is effective, in which a weak direct current is passed through a water bath. In the armpits, botulinum toxin can significantly reduce sweat production for several months. There are also tablets that inhibit the sweat glands but can cause a dry mouth, and surgical procedures as a last option.
Everyday tips
Breathable clothing made of natural fibres or functional material, leather shoes, changing socks and shoes, and moderation with spicy food, alcohol and caffeine can help. Suddenly occurring heavy sweating, especially at night with fever or weight loss, should be assessed by a doctor.
Related terms in the encyclopaedia
Sweat glands, Botulinum toxin, Sage, Hyperthyroidism
Further reading on Medizin Aktuell
Sources
- Deutsche Dermatologische Gesellschaft (DDG): S1-Leitlinie Definition und Therapie der primären Hyperhidrose
- IQWiG: gesundheitsinformation.de – Gesundheitsinformationen des Instituts für Qualität und Wirtschaftlichkeit im Gesundheitswesen
Note: This article is for general information and does not replace advice, diagnosis or treatment from a doctor or pharmacist. Last updated: October 2026.