There are many causes of small blisters on fingers, such as herpes sweat, tinea cruris, eczema, herpes, burns, abrasion and so on. 1. Sweat herpes: the cause of the disease is still unclear, may be related to environmental factors, genetic factors, psychological factors, etc., easy to cause skin blisters, itching, pain and other symptoms, may lead to the appearance of small blisters on the fingers. 2. Ringworm: fungal infection causes blistering ringworm, which may lead to the appearance of small blisters on the fingers. 3. Eczema: Inflammatory skin reactions caused by internal and external stimuli can also cause small blisters on the fingers and itching. 4. Herpes: Skin herpes caused by herpes simplex virus infection can also have the appearance of small blisters on the fingers. 5. Scalding: Scalding of the fingers due to external high temperature stimulation can also lead to small blisters on the fingers. 6. Wear and tear: As the skin of the hand is subjected to localized repeated friction, it is also possible to cause congestion, swelling, and the formation of exudate leading to small blisters on the fingers. Finger blisters, there may be other reasons need to go to the hospital in time to check, follow the doctor’s instructions for treatment.