Acne marks on the back are mainly categorized into red acne marks and black acne marks. Red acne marks are caused by capillary dilation after inflammation, while black acne marks are caused by pigmentation after inflammation, which can be eliminated through medication and physical therapy. 1. Red acne marks: red acne marks generally do not require special treatment, will fade with time, during which you can apply mucopolysaccharide polysulfate cream to promote recovery. If you want to recover quickly, you can also take photorejuvenation, pulse dye laser and other physical methods to get rid of. 2. Black acne marks: you can use topical retinoic acid drugs, such as adapalene gel, retinoic acid ointment, tazarotene cream, etc., or inhibit tyrosinase activity class of drugs, such as hydroquinone cream, deoxy arbutin and so on. Some patients can also take oral vitamin C, tranexamic acid, etc. to relieve hyperpigmentation. If the patient is ineffective after medication, physical therapy, such as intense pulsed light, peeling fractional laser can be taken to treat. If the patient has acne marks on the back, according to their own needs, go to a regular hospital, under the guidance of the doctor to take treatment measures, the drug should be used in accordance with medical advice. In daily life, you need to maintain sufficient rest time, do not overwork or stay up late for a long time.