Black marks on the face abrasion is considered as traumatic hyperpigmentation, need to pay attention to sunscreen, some patients can subside on their own, if necessary, can be improved by medication, chemical exfoliation, physical therapy and other ways. Traumatic hyperpigmentation is caused by a variety of traumatic skin damage caused by skin pigmentation changes, the color will deepen after sun exposure. Usually the recovery is slow, usually 3 months to begin to fade, a small number of lifelong existence, if necessary, can follow the doctor’s instructions for treatment. 1. Medication: Hydroquinone and 4-hydroxyanisole can oxidize the toxic metabolites of melanocytes. Azelaic acid can play a role in preventing DNA synthesis and anti-tyrosinase activity in hyperfunctional melanocytes. Vitamin A acid can inhibit the proliferation of melanocytes, regulate the expression of cytokines, and then regulate the production and transit of melanocytes, which has the effect of decolorization. 2. Chemical peeling: It is through the use of chemicals such as salicylic acid, hydroxyacetic acid and other chemicals applied to the skin, resulting in the destruction of epidermal cells, so that the epidermis is peeled off and the superficial tissues are ischemic, scabbed, and peeled off to form a newborn epidermal tissue, fading hyperpigmentation spots, in order to achieve the purpose of treating hyperpigmentation. 3. Physical therapy: mainly includes intense pulse light and laser therapy. The former mainly destroys melanin through photothermal decomposition effect, while the latter can make melanin in the skin instantly break into tiny particles after absorbing high energy laser through the selective photothermal effect of laser, so as to achieve the purpose of fading or eliminating pigmentation spots. The above treatments can improve post-traumatic hyperpigmentation to a certain extent, but the actual effect varies from person to person, so it is necessary to follow the doctor’s instructions to standardize the treatment.