Children have red bumps on the buttocks, if it is simply the anal area, it may be eczema, there may be fungal infections, and may be caused by allergies. There are several situations, such as long-term wear diapers lead to localized muffled heat, it is recommended to change to diapers, keep it dry and permeable, do not wear too much, too muffled heat, as long as the limbs are warm and the trunk is warm. If it improves in this way, no medication is needed. If there is no improvement, you can use anti-allergic ointment or dehumidifying and anti-itching cream. If it is caused by long-term diarrhea, you need to treat diarrhea as soon as possible, and then use erythromycin ointment externally. There may be fungal infections, such as long-term antibiotics or not pay attention to hygiene, resulting in dysfunction of the organism’s flora, the local area will appear red bumps caused by fungal infections, you can use the tablet of mithramycin crushed and then coated in the local area.