Hyperhidrosis hyperhidrosis or excessive sweating affects almost 2 of the population but unfortunately it remains largely under diagnosed and under treated due to the lack of awareness of this condition hyperhidrosis typically starts during adolescence and with no definitive cause it simply becomes a way of life for those with axillary armpit hyperhidrosis fashions trends of brighter coloured clothes is simply not an option instead sufferers tend to have a large wardrobe selection o