I did find this on wikipedia. This is just part of the article.
"Hyperhidrosis is the condition characterized by abnormally increased perspiration,in excess of that required for regulation of body temperature.
The cause of primary hyperhidrosis is unknown, although some surgeons claim that it is caused by sympathetic overactivity. Nervousness or excitement can exacerbate the situation for many sufferers. Other factors can play a role; certain foods and drinks, nicotine, caffeine, and smells can trigger a response.
A common complaint of patients is that they get nervous because they sweat, then sweat more because they are nervous."
"If the only thing people learned was not to be afraid of their experience, that alone would change the world." -Syd Banks