hyperhidrosis /hī′pərhīdrō″sis, -hidrō″sis/ [Gk, hyper + hidros, perspiration] , excessive perspiration often caused by heat, hyperthyroidism, strong emotion, menopause, or infection. Symptomatic therapy usually includes topical antiperspirants and anticholinergics or Botox. Severe cases may be treated with surgery. Also called hyperidrosis, polyhidrosis, polyidrosis.