What is the cause of hyperhidrosis?
The exact cause or causes of hyperhidrosis are unknown. It appears to be due to overactivity of the body temperature centre in the brain (the hypothalamus) or of the sympathetic nerves that control the sweat glands. Primary hyperhidrosis first appears in childhood or adolescence. It may persist lifelong, or improve with age. Other family members may or may not be similarly affected. Secondary hyperhidrosis as a consequence of a medical disease or condition is less common.
