Hyperhidrosis is the condition characterized by abnormally increased perspiration, in excess of that required for regulation of body temperature. Hands, feet, armpits, and the groin area are among the most active regions of perspiration due to the relatively high concentration of sweat glands; however, any part of the body may be affected. njections of botulinum toxin type A, under the brand names Botox or Dysport, are used to disable the sweat glands. The effects may persist from four to nine months depending on the site of injection. This procedure has been approved by the U.S. Food and Drug Administration (FDA) to treat underarm sweating.