Sudden growth of small blisters (blisters) on the fingers may be related to factors such as dyshidrotic eczema, tinea cruris and contact dermatitis. 1. Sweating bad eczema: that is, sweat herpes, mostly related to local allergies, local infections, excessive sweating and mental factors, often manifested in the palms of the hands. Small blisters appear on the soles of the feet, accompanied by itching, burning sensation and so on. 2. Ringworm: a skin disease caused by infection with ringworm, in which blister-type ringworm is mainly manifested as intensive small blisters, and itching can occur, and later peeling phenomenon can occur. 3. contact dermatitis: with skin contact with irritating or sensitizing articles, in addition to blisters, may also appear pimples or erythema, usually accompanied by different degrees of itching. Because the skin can cause small blisters of more reasons, the specific circumstances need to first ask the doctor for an interview and improve the relevant examination.