Infant hands long small blisters common causes are as follows: 1, sweat herpes, sweat herpes is mostly seen in the palm of the hand, the side of the fingers, finger crevices and fingertips of the skin of the small blisters, the size of a grain of rice, hemispherical, slightly higher than the skin, is the baby contact with certain allergic substances caused by the external use of clobetasol propionate cream. At the same time, pay attention to the child’s hand hygiene, to wash hands, keep hands dry. 2, herpes virus infection, is a local infection of herpes virus, will not enter the body, only herpes on the hands, after a few days can subside, do not have to dispose of. 3, hand, foot, mouth and mouth disease, is an acute infectious disease caused by enteric viruses, in addition to herpes on the hands of herpes, the oral cavity, feet and buttocks, herpes, can be accompanied by fever or not accompanied by fever, the majority of the Most of the cases can be cured in about one week and the prognosis is good. A small number of babies with high fever that does not go away can be accompanied by encephalitis, cardiopulmonary failure, etc., should be promptly sent to the hospital for treatment.