Blisters are known as blisters. Children’s finger cracks long small blisters may and herpes sweat, contact dermatitis, herpes simplex and other factors related. 1. Sweat herpes: sweat herpes actually belongs to a kind of eczema, when the patient sweats more, and not timely wipe and cleaning, is likely to lead to the emergence of sweat herpes, the main clinical manifestations of small blisters on the fingers, followed by oozing, flaking and so on. 2. contact dermatitis: patients who come into contact with some allergens or irritants will cause allergic or irritant reactions on the hands, resulting in small blisters on the finger cracks. 3. Herpes simplex: when the skin of the hand is infected with the herpes simplex virus, it can also lead to small blisters and large blisters on the fingers, accompanied by pain and other symptoms. Children’s finger blisters may also have other reasons, parents are advised to take their children to the hospital for relevant examinations, clear causes and then actively treat the symptoms.