Are you a victim of excessive sweating under your arm? Well you're not alone. There are over a million people a year who suffer from the same thing. The medical term for this is hyperhidrosis. Seating is a part of the natural mechanism for our bodies to cool down. However, hyperhidrosis can cause physical discomfort, not to mention the effect it has on the self-esteem. When sweat penetrates the clothing and body odor is present, it can be embarrassing.