What disease or ailment that cause too much perspiration?

Many diseases and conditions can cause extreme perspiration. The flu can cause it, most stomach bugs can cause it, anything with a fever can cause it (unless your already completely dehydrated). Some people also simply sweat more than others. Too much perspiration is not a skin condition, but usually is a sign that you are sick with something. I sweat and have the chills at the same time when I have a really bad stomach ache. Of course exercise causes lots of sweating as well. Depends on the cirstances. If you have not exerted yourself and it is not hot, you are either sick or extremely nervous. One cannot diagnose something simply by how much they sweat.