Acne on the back may be due to folliculitis, acne and other factors, you need to clarify the cause of the disease, and then targeted treatment, common treatment drugs are mupirocin, econazole, retinoic acid and so on. 1. Folliculitis: Acne on the back may be caused by folliculitis, which may be related to bacterial and fungal infections. Patients should pay attention to the cleanliness of the skin on the back, change clothes and bedding frequently, and avoid the use of irritating bathing products, etc.; antibiotic drugs such as mupirocin and erythromycin can be used to apply topically in case of bacterial infections; antifungal drugs such as econazole and ketoconazole can be used in case of fungal infections. 2. Acne: It is a chronic inflammatory skin disease caused by the blockage of hair follicles, which can be manifested as pimples, papules, herpes, nodules and other different forms. It can be treated with medications such as retinoic acid ointment, tazarotene gel, benzoyl peroxide, and can be supplemented with physical therapy such as photodynamic therapy and fruit acid therapy. Acne on the back may also be caused by other factors, it is recommended that patients seek timely medical attention in order to clarify the cause of the disease, standardized treatment under the guidance of the doctor, to avoid private medication, so as not to delay the condition.