Primary hand sweating is a phytodysfunctional disorder that is common among young people in subtropical regions. It affects about 0.6% to 1% of the world’s population, with a higher percentage of Easterners than Westerners, and about 40% of patients have a family history of the disease. The main manifestations are: excessive sweating of the palms bilaterally, independent of the external temperature; in mild cases, the palms are moist; in severe cases, the palms may secrete beads of sweat visible to the naked eye, and in severe cases, sweat may drip along the fingers. Sweating is extremely associated with emotional activity, and sweating is more frequent when nervous, and in some cases, the hands sweat immediately at the thought of sweating. The symptoms are sudden and intermittent, and each attack usually lasts 5 to 30 minutes, and the number of attacks per day is variable, while sweating during sleep is not much. The symptoms are more severe in summer and relatively less severe in winter.