Small blisters on the finger without pain or itch may be related to the finger herpes sweat, finger herpes simplex, herpetic epidermolysis bullosa and so on, finger herpes sweat, finger herpes simplex is generally not serious, herpetic epidermolysis bullosa is generally more serious, the specific degree of severity due to individual differences. 1. Finger sweat herpes: sweat herpes is a common skin disease, generally not serious, caused by allergies, sweaty hands, dermatophyte infections, etc., mainly manifested in the finger epidermis hairy deep in the small blisters, the patient can be no obvious pain and itching, external glucocorticoid drugs such as dinexed ointment or oral antiallergic medication, generally in 2-3 weeks can be improved. 2. Finger herpes simplex: generally not serious, mainly caused by the infection of herpes simplex virus, manifested in clusters of blisters, there may be no obvious pain and itching, there is a certain degree of self-limitation, topical or oral antiviral drugs, such as acyclovir, can generally be improved, but more likely to recur. 3. herpetic epidermolysis bullosa: generally more serious, is a genetic abnormality caused by autoimmune diseases, manifested as blisters in the joints of the limbs, blood blisters. Among them, the simple type of lesions is the most superficial, the prognosis is better; dystrophic type can involve any part of the body, the condition is more serious, the late phalangeal atrophic change; junction type is rare, extensive blisters and vesicles appeared after birth, the prognosis is poor, and most of them died within 2 years old. It is recommended that the patient go to the hospital as soon as possible, after clarifying the cause of the disease, follow the doctor’s instructions for treatment, do not self-medication.