There are two types of excessive sweating: localized (when mainly your palms or soles, or armpits sweat) and generalized, where your body sweats all over.
This article about excessive palmar sweating may explain sweating mechanism to you.
How old are you, male female?
Do you live in hot climate?
Do you also sweat at night?
Anyone from your family has the same problem?
Which medications (in general) are you currently taking?
What's your morning body temperature (measured in mouth or in armpits)?
Any other symptoms: itch, rash, digestion problems..?