Small rashes on the back of children’s hands may be caused by allergies, or the development of tinea versicolor, hand-foot-mouth disease and other diseases. 1. Allergy, if usually often contact with allergy-prone substances or eat allergy-prone food, may lead to allergic reactions, so the symptoms of small rashes on the back of children’s hands will appear. 2. Tinea versicolor, if usually often play with sand, toys or rubbing on the ground may induce friction tinea versicolor, so there will be children’s hands on the back of a small rash symptoms. 3. Hand, foot and mouth disease, if you don’t pay attention to hygiene, enterovirus invasion may induce hand, foot and mouth disease, children’s hands on the back of a small rash, blisters and other symptoms. Children with small rashes on the back of the hands may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.