Hyperhidrosis or excessive sweating is a common disorder affecting many people. Palmar hyperhidrosis or sweaty palms is the most common form of hyperhidrosis, causing excessive sweating of the hands. Hyperhidrosis can also cause excessive foot, underarm and facial sweating. It is thought that hyperhidrosis is a result of over activity of the sympathetic nervous system. Sweating is often uncontrollable, embarrassing and not anticipated . Normal sweating is needed for thermal regulation however in people suffering from hyperhidrosis, sweating exceeds the bodys need for physiological thermal regulation.