Herpes on the hands may be contact dermatitis, or it may be caused by chickenpox or herpes zoster, herpes sweat, etc. Contact dermatitis is caused by contact with sensitizers or irritants, chickenpox and herpes zoster are caused by varicella zoster virus infection, and the etiology of herpes sweat is still not completely clear. 1. Contact dermatitis: it is an acute or chronic inflammatory reaction at the contact site caused by direct contact of the skin or mucous membranes with an exogenous irritant or allergenic substance, which may appear as papules, blisters, and pimples on the hands, accompanied by itching and discomfort. 2. Chickenpox and herpes zoster: due to the body previously infected with chickenpox – herpes zoster virus, in the case of low immunity, excessive fatigue, etc., will lead to the reactivation of the virus, neurophilic and inflammatory reaction, usually appearing in the body of the unilateral, manifested in the erythema of the base of the appearance of blisters, banded distribution, accompanied by burning, burning, pain, pain, neuralgia. 3. Sweat herpes: also known as sweating not good eczema, a kind of non-inflammatory blistering disease occurring in the palm and plantar, fingers (toes) side, the etiology of the disease is still unclear, may be related to psychiatric factors, local infections, allergies, manifested as a skin deep in the rice grain size of the blisters, slightly above the surface of the skin, accompanied by sweaty hands and feet, peeling, burning, itching, and other symptoms, regular episodes every year, more common in the summer. Hand herpes may also be due to other factors, it is recommended that patients seek medical attention in a timely manner, under the guidance of the doctor for relevant examinations, in order to clarify the diagnosis and symptomatic treatment.