Acne on the back and neck is mostly seen as a symptom caused by acne, Malassezia folliculitis and other diseases. Different causes are treated differently, and patients need to undergo general treatment, medication, and physical therapy under the guidance of a doctor. 1. Acne: Acne is a chronic inflammatory disease of the sebaceous glands of hair follicles. Patients need to pay attention to a healthy diet, develop good living habits and keep the skin clean. Adapalene gel, benzoyl peroxide gel and other drugs can be used topically. Patients with ineffective topical drug treatment can take oral minocycline, clarithromycin and other drugs. Mild to moderate lesions can be combined with red and blue light treatment. 2. Malassezia folliculitis: Malassezia folliculitis is an inflammatory damage of the hair follicle caused by Malassezia. Treatment should choose good permeability of topical antifungal drugs (such as ketoconazole cream, 50% propylene glycol), can also be supplemented with 2% ketoconazole lotion or 2.5% selenium disulfide shampoo bath. If necessary, oral antifungal drugs such as itraconazole can be combined. All of the above drugs should be used under the guidance of a doctor, the patient can not be used on their own, so as not to delay the condition. Back neck acne patients need to go to the hospital in time, under the guidance of the doctor for formal treatment.