Acne marks are pigmentation left after the inflammation of acne or folliculitis subsides. Acne marks on the back can be removed by medication, physical therapy and chemical peeling. 1. Medication: Topical use of Adapalene and other vitamin A drugs as prescribed by the doctor can help improve acne marks. 2. Physical therapy: photodynamic therapy can prevent or reduce acne marks; red light irradiation has a tissue repair effect, which is conducive to the removal of acne marks; laser therapy can improve post-acne erythema, hyperpigmentation and scarring. 3. Chemical peeling: If acid peeling can improve pigmentation and mild scarring, it is conducive to removing acne marks. It is recommended that people who have the need to get rid of back acne marks go to a regular hospital in time, and under the guidance of the doctor for standardized treatment.