The amount you sweat will be hugely reduced following hyperhidrosis treatment. The reason it works is that the Botox will block the signal between the nerve and the sweat gland, and so stop/reduce the sweat produced. This relaxes the overstimulated muscles in an attempt to stop sweat production. We would certainly expect common side effects of hyperhidrosis, such as having wet clothes, and an unpleasant odour, to no longer be a problem.