The symptom of many bumps on the buttocks of children, and especially itchy, is considered to be due to prickly heat, eczema, hives and other factors. It can be relieved by topical medication, oral medication, and home care. 1. prickly heat: generally occurs in the hot summer, especially in the high temperature environment, if the child toilet clothing thicker, may be due to sweat ducts blocked, thus appearing prickly heat phenomenon, manifested as a lot of localized pimples along with the itching symptom, can be used externally with glycerite lotion, can achieve the purpose of stopping the itching. 2. Eczema: a lot of pimples on the child’s buttocks, accompanied by symptoms of itching, may be related to eczema factors, after diagnosis, can cooperate with the doctor to choose hydrocortisone and other glucocorticosteroid drug treatment, to achieve anti-inflammatory and anti-itching purpose. 3. Urticaria: If the child belongs to the allergic body, after contact with allergens, may cause local pimples and itching symptoms, can be used externally with glycerite lotion, oral loratadine drug treatment. And remove the allergens as soon as possible to avoid repeated attacks of allergy symptoms. If the above symptoms occur, it is recommended to go to the hospital in time, early formal treatment, not blindly use drugs.