Acne mark melanin precipitation, that is, post-acne inflammation hyperpigmentation, can be effectively removed by topical medication application, fruit acid, salicylic acid resurfacing, and if necessary, laser treatment. 1. Medication: In the early stage of post-inflammatory hyperpigmentation after acne, hydroquinone cream, arbutin cream, and retinoic acid cream can be applied externally under the guidance of a doctor, which can inhibit the formation of melanin, and also promote the metabolism of melanin. 2. Fruit acid, salicylic acid skin resurfacing: If necessary, go to the hospital dermatology, cosmetic surgery department. Combined with the doctor’s advice through the fruit acid, salicylic acid skin resurfacing treatment, can accelerate the discharge of melanin, to achieve more obvious therapeutic effect. 3. Laser treatment: post-acne inflammation hyperpigmentation is formed over a long period of time, the effect of medication is not good, if necessary, you can choose laser treatment, such as picosecond laser, Q laser, can effectively remove the melanin precipitation left behind by the acne. If you have post-acne inflammation hyperpigmentation, it is recommended to go to the hospital and ask the doctor to make a suitable treatment plan.