Hyperhidrosis is an extremely unpleasant and frustrating condition in which a person suffers from excessive sweating. About 3 percent of the population experience hyperhidrosis. It is usually most visible in the palms, soles and armpits.
The main function of sweating is to protect the body from overheating by cooling it, but in case of hyperhidrosis, the perspiration is much more intensive than is needed for this protection.
There are two types of hyperhidrosis: localized and generalized. In some cases, generalized hyperhidrosis might be a symptom of chronic diseases (some chronic infections, oncology, diabetes, gout, thyroid disease) or hormone imbalance (menopause, obesity).
However, in most cases this annoying condition affects perfectly healthy people. It is called primary (idiopathic) hyperhidrosis and is caused by hypersensitivity of the nerves that innervate the sweat glands. Primary hyperhidrosis can be successfully treated with injections of botulinum toxin.