The pigmentation left behind by acne marks can be removed through medication, chemical peeling and photorejuvenation. 1. Drugs: commonly used drugs such as benzoyl peroxide and topical retinoic acid can treat acne pimples and also lighten acne marks and inhibit melanin production. 2. Chemical peeling: It refers to applying chemical peeling agent on the lesion skin, so that keratin coagulation, epidermis and dermal papillae are necrotic to different degrees, and the stratum corneum is then peeled off and gradually replaced by newly grown epidermis, which can improve the role of pigmentation left by acne marks. 3. Photorejuvenation: It is a non-exfoliating and non-invasive skin treatment technology with the effect of targeting melanin, collagen and hemoglobin at the same time. Under the protection of normal skin, it utilizes selective photothermia produced by sufficient energy density to remove acne marks. In addition, it is recommended that patients with acne marks go to the hospital in a timely manner and follow the doctor’s instructions to avoid delays.