Back acne can be treated by retinoids and antibacterials. 1. Vitamin A acid drugs: commonly used are tazarotene gel, adapalene gel, etc. These drugs can help dissolve and discharge acne and improve pigmentation. Among them, adapalene gel has adverse reactions such as erythema, itching, burning, dryness, scaling, etc. Patients need to use it under the guidance of a doctor. 2. Antibacterial drugs: For patients with acne accompanied by bacterial infection, antibacterial drugs need to be used to treat, such as benzoyl peroxide, erythromycin, clindamycin and so on. Patients with acne on the back need to pay attention to daily skin cleaning and moisturizing. It is recommended to go to the hospital as soon as possible, according to the doctor’s guidance to improve the condition of medication, so as not to aggravate the condition, resulting in serious consequences.