I've excessive sweating. What is the best treatment for this?

What's the cause. First find out the cause. See your doctor to discuss this. If nothing found, then you most likely have hyperhidrosis which is a condition where people gets excessive sweating in the head, armpits, hands and feet. The treatment is: antiperspirant, oral medications, iotophoresis (electrical shocking of the sweat glands- very easy to do) and Botox injection (very effective but temporary).