Injuries on the face leave black marks is due to trauma and inflammation caused by hyperpigmentation, can be faded through medication, physical therapy and other ways. 1. Medication: such as cumulonimbus cream ointment, vitamin A cream, etc., to promote epidermal metabolism to promote the absorption of melanin; can be taken orally at the same time, vitamin C or vitamin E, etc., can promote the metabolism of melanin. 2. Physical therapy: such as photorejuvenation, picoseconds, etc., through the strong pulse light selectively make the skin surface pigment particles gasification, and at the same time promote the skin deep collagen fibers and elastic fibers regeneration, to achieve the purpose of lightening the pigmentation. It is recommended to go to regular medical institutions to use drugs under the guidance of specialists, and strict sun protection during treatment.