Botox, the final answer for excess sweating? Excessive perspiration, or hyperhidrosis as its known, is a daily problem for many people. Hyperhydrosis is excessive sweating and most commonly begins in childhood or adolescence. Expensive antiperspirants often only slightly reduce the problem and the dampness is still visible. What’s worse, many people report that worrying about their sweating actually makes them sweat more. This can be a real blight on people’s lives, especially when the problem gets so bad that they avoiding social situations, and may suffer a severe loss of confidence socially or in the work place.