Acne marks left after acne healing, also known as inflammatory hyperpigmentation, can be relieved by temporary observation, topical retinoic acid cream, and laser treatment. 1. Temporary observation: Because the phenomenon of post-inflammatory hyperpigmentation will slowly fade over time, or even subside on its own. Therefore, if these patients do not have other obvious symptoms, you can choose to temporarily observe, not to deal with. During the period, pay attention to hydration and moisturizing, strict sun protection. 2. Topical retinoic acid cream: patients can also use topical retinoic acid cream to promote the renewal of epidermal cells, commonly used drugs include adapalene, etc., which can reduce the phenomenon of local melanin precipitation. 3. Laser treatment: This is also one of the commonly used methods, through laser treatment can be selective photothermal effect on the deposition of melanin burst, crushed with the skin metabolism out of the body. It is recommended that patients who are willing to treat acne marks go to a regular medical institution for consultation and standardized treatment under the guidance of a specialist physician, and do not blindly use medication.