Back acne may be caused by folliculitis, acne, sebaceous cysts, etc. It can be solved by medication, surgery and physical therapy. 1. Folliculitis: mainly due to bacteria, fungi and other pathogens caused by hair follicle infection, can be manifested as red papules around the hair follicle. It needs to be clearly diagnosed and then treated for the pathogens. For bacterial infection, topical mupirocin ointment can be used, and if fungal infection is considered, topical terbinafine cream and other drugs can be considered. 2. Acne: It is a chronic inflammatory disease of the sebaceous glands of the hair follicles, which can be manifested as pimples, papules, and pustules on the face and back of the chest. Treatment can be topical azelaic acid, fusidic acid, retinoic acid and other drugs, serious cases can also be excluded from the relevant contraindications after oral retinoic acid, fractional laser and other photoelectric treatment for acne also has a certain effect. 3. Sebaceous cysts: cysts are formed when the sebaceous gland ducts are blocked and the contents of the glands accumulate, and the patient’s cysts will be cut open to remove the swelling, and laser treatment can be used if necessary. If the symptoms of back acne are not relieved after lifestyle modification, you should consult a doctor in time to clarify the cause of the disease, under the guidance of the doctor for treatment.