Hand sweating occurs in adolescents and even in childhood, and is characterized by sweaty palms, sweating easily in hot or stressful days and in confined environments, and sometimes cold and wet palms. In addition to sweaty hands, the feet and armpits tend to sweat as well, and some sweat on the head, face, and groin. The sweating can be mild or severe, with mild sweating just damp skin, moderate sweating soaking through a handkerchief, and severe sweating dripping downward. There is a certain genetic predisposition Hand sweating often has a family history, with a positive family history of up to 40%-60%, and is a disorder with a genetic predisposition. It may be related to abnormal sympathetic excitation There are approximately 4 million sweat glands in the human body, mainly in the palms of the hands, soles of the feet, armpits and face area. They are controlled by sympathetic nerves. If you think of sweat glands as light bulbs, then sympathetic nerves are like electrical wires. Patients with hand sweating have abnormal sympathetic excitation, which is like having too much current in an electric wire, and sweating more than the average person.