Hyperhidrosis describes excessive sweating from the Eccrine gland. It’s often a familial condition, which is still not well understood; It’s lilkely to be due to an overactivity of the autonomic nervous system. Sweating is a way of the body to cope with heat, and avoid hyperthermia in hot weather or when exercising. Excessive sweating can be due to illness associated with high temperature, metabolic conditions such as hyperthyroidism, spinal injury and various drugs such as antidepressants. It can be primary, which means with no obvious causes and in that cases it is often familial. Primary hyperhidrosis can start very early in life and can affect different sites (armpits, hands, feet, face, scalp, trunk, back) among different members of the family. It is triggered by anxiety, emotion, hot weather and sometimes physical exercise. Just thinking about it makes the patient sweating.