Pimples on a girl’s buttocks may be eczema, folliculitis, ringworm and so on. Can be given to stop itching, glucocorticoids, anti-infection, anti-fungal drug treatment. 1. Eczema: the cause of eczema is complex, may be caused by a variety of internal and external factors, resulting in skin papules, erythema, blisters and other rashes with itching. You can use hydrocortisone butyrate cream, tretinoin ointment and so on to apply. If necessary, with oral loratadine, ebastine and other drugs to help relieve itching. 2. Folliculitis: Folliculitis is caused by a bacterial infection that can occur on the buttocks, resulting in localized red, swollen, hot and painful bumps. You can apply topical clindamycin gel, erythromycin ointment and mupirocin ointment externally. If combined with fungal infection, ketoconazole cream, terbinafine, fluconazole and other drugs can be given. 3. Ringworm: superficial cutaneous fungal infection caused by pathogenic fungi parasitized on the smooth skin of human body, which can also occur on the buttocks, manifested as light red papules, pimples, scales, clear boundary and itchy feeling. It can be treated with topical medications such as miconazole nitrate cream and amorolfine cream. If the disease is serious or the external drug treatment is resistant, oral itraconazole capsules and other treatments can be given. Girls with acne on the buttocks, it is recommended to find and remove the triggering factors, avoid scratching stimulation, hot water scalding, resulting in aggravation of the symptoms, but also under the guidance of the doctor to give treatment.