Excessive sweating (hyperhidrosis) can be socially as well as professionally disruptive and can lead to considerable emotional stress and embarrassment so patients who suffer can be successfully treated with Botox injections. When injected locally into the skin of a problem area, Botulinum toxin type A potently blocks the nerve fibres used to stimulate sweat glands, resulting in almost complete cessation of sweat production from that area. As the toxin is injected only within the skin, there is no risk of affecting deeper muscle structures and therefore their function. The effects of the Botulinum toxin A treatment takes three to seven days to be demonstrated, and the sweat free effects last between three and 12 months. Repeat injections produce similar results. The treatment is well tolerated and is void of any adverse side effects.