Perspiration normally serves to regulate body warmth and is therefore a natural body function. Humans have around 2 million sweat glands. Perspiration is odourless and clear. Perspiration is controlled by part of our nervous system, known as the vegetative nervous system. In some people (about 1% of the population) this system works overtime, far more than necessary, in order to maintain a constant body temperature. This disorder is termed hyperhidrosis (Latin: hyperhidrosis). 

The localisation of hyperhidrosis varies widely. Any area of the body can be affected. Most frequently and severely affected are the hands and armpits, followed by the head and neck, trunk and feet, inner sides of the thighs and perspiration folds on the back. As a result of this excessive perspiration, those affected often tend to have cold hands and feet,  frequently suffer from colds, have an increased incidence of skin disorders (e.g. soreness, fungal infections, warts) and body odour.
For most of the patients affected, excessive perspiration causes psychological stress which may lead in turn to social problems. Patients may also be restricted in carrying out their job. Depending on the nature and cause of hyperhidrosis, various methods can be used to treat the condition. Measures which can reduce the perspiration should firstly be tried. These include, for example, smoking less and restricting the consumption of drinks containing caffeine. Deodorants can also be used to try to reduce the production of perspiration. If these simple measures do not help, special forms of therapy are the only means which can successfully counteract hyperhidrosis.
Two options have proved to be particularly suitable and effective, Botulinumtoxin A Injection or the operation (sweat gland suction).