Acne on the back, known as back acne, can be treated with sulfur ointment under the supervision of a specialist. Sulfur ointment has the ability to kill fungi and bacteria, and also has the ability to dissolve oil and promote keratin metabolism. It is mainly used for scabies, tinea capitis, acne, seborrheic dermatitis, simple furfuraceous rash and so on, so it has a certain therapeutic effect on folliculitis and acne in the back area. Adverse reactions of sulfur ointment are skin irritation, burning sensation; contraindications are allergic to the drug; precautions include avoiding contact with eyes and mucous membranes; the burning sensation taken at the site of application should be discontinued immediately; children need to be used under adult supervision. Acne treatment is a comprehensive treatment, a single drug is difficult to achieve the desired therapeutic effect, it is recommended to follow the recommendations of the specialist physician to standardize the complete treatment. It is recommended that patients who are willing to be treated go to a regular hospital in time, under the guidance of a professional doctor for standardized treatment.