Blisters are medically referred to as blisters. Blisters on the hands may be caused by eczema, ringworm, sweat herpes and other causes. 1. Eczema: clinically, eczema is caused by more reasons, usually associated with genetic factors, external factors stimulation, mental factors and other factors, such as prolonged contact with dyes, detergents, etc., may be induced by eczema on the hands, resulting in blisters on the hands, which may also be accompanied by itching, pain and other symptoms. 2. Ringworm: this disease is mainly caused by fungal infection, under the stimulation of fungi, it may lead to blisters on the skin of the hands, and may be accompanied by erythema, scaling, and hand skin ulceration and other symptoms. 3. Sweat herpes: usually associated with prolonged sun exposure, skin allergies, friction, poor sweating, mental factors and other factors, when the hands appear after sweat herpes, can lead to blisters on the hands, may also be accompanied by the affected area of the skin itching, pain, and peeling and other manifestations. Blisters on the hands, may also be related to other factors, it is recommended to consult a doctor as soon as possible, after a clear diagnosis, under the guidance of the doctor for targeted treatment and conditioning.