Acne on the back, generally known as common acne, is mainly treated with the following methods: i. retinoids, oral isotretinoin capsules to inhibit sebaceous gland secretion; ii. antibiotics, because there is a local proliferation of Propionibacterium acnes, you can take oral minocycline capsules, roxithromycin capsules, etc.; iii. estrogen, because androgen secretion is exuberant, you can take oral da-ing-35 for treatment; iv. herbal medicine treatment, such as oral clearing acne capsules, acne pills, compound pearl acne tablets, etc.; v. Topical drug treatment, topical benzoyl peroxide gel, clindamycin phosphate gel, adapalene gel, etc.; vi. Physical therapy, with red and blue light or photodynamic therapy.