Acne is a common skin lesion of acne. Acne on the back can be removed by changing dietary habits, applying medication topically and taking medication orally. 1. Change dietary habits: patients should reduce the intake of high sugar and high fat foods, such as cakes, tarts, French fries, whole milk, etc., and eat fresh fruits and vegetables and coarse grains. 2. Topical medication: Patients can apply retinoic acid drugs, such as tazarotene, adapalene, etc. as prescribed by the doctor to improve the keratinization of follicular sebaceous gland ducts and dissolve acne, or use benzoyl peroxide, azelaic acid, clindamycin, etc. to kill or inhibit Propionibacterium acnes. 3. Oral medication: If the condition is serious, oral antibiotics such as doxycycline and minocycline can be taken as prescribed by the doctor, and oral isotretinoin can also be taken for treatment. In addition, glucocorticosteroids such as prednisone may be used at the discretion of the doctor for coalescing acne and fulminant acne. In addition, physical therapy can be used to improve the symptoms of lesions. Patients are advised to visit the hospital in time and choose the appropriate treatment plan after evaluation by the doctor.