Some people sweat more than others to regulate body temperature. They present hyperhidrosis, pathology caused by a high production of sweat. They have excessive sweating in the feet, armpits or palms of the hands, more rarely in the neck and legs. This sweating is annoying, inconvenient for the relatives and can represent a real handicap. Hyperhidrosis may be of simple, moderate or severe form. It can be localized to a part of the body, hands or armpits for example or generalized to the whole body.