Blame it on the brain

According to a Mayo clinic study, hyperhidrosis originates in the brain: "...one part of the brain controls the sweating response to body temperature, while another area controls the sympathetic, or emotional sweating response. For reasons unclear to hyperhidrosis researchers, the emotional component is in overdrive. The result is typically a healthy individual who perspires excessively, even in mildly stressful situations, such as a handshake or job interview."