Sweating is the body's way of cooling itself and is a normal response to a hot environment or intense exercise. However, Hyperhidrosis (excessive sweating unrelated to these conditions)--as sweat retention syndrome--can be a problem for some people. Those with constantly moist hands may feel uncomfortable shaking hands or touching, while others with sweaty armpits and feet may have to contend with the unpleasant odor that results from the bacterial breakdown of sweat and cellular debris (bromhidrosis). People with hyperhidrosis often must change their clothes at least once a day, and their shoes can be ruined by the excess moisture. Hyperhidrosis may also contribute to such skin diseases as athlete's foot (tinea pedis) and contact dermatitis.

Sweat retention syndrome, or miliaria rubra, also known as prickly heat, is a common disorder of the sweat glands.

The skin contains two types of glands: one produces oil and the other...