The appearance of red bumps on the buttocks of children should be considered a manifestation of diaper dermatitis. Because after wearing diapers for a long time or after the stimulation of urine, it is easy to appear skin rashes. This situation, to get rid of the triggering factors, try not to give the baby to wear diapers at night, even if you have to wear diapers, do not wear through the tight or colorful diapers. One more, you can apply topical puff powder to keep the area dry. Serious cases can be treated with medication, and if there is oozing vesicles, you can apply wet compresses with boric acid solution externally. If there is a long period of crusting or thickening of the skin, mossy lesions, you can use weak glucocorticosteroids locally.