Brown marks left by trauma on the face, is the wound in the healing process to stimulate melanocytes, secretion of a large number of melanin caused by the laser, topical medication can be used to restore the way. 1. laser: through the high-intensity beam, the use of laser will melanin disintegration, destruction, melanin is crushed with the metabolism can be discharged from the body, so as to achieve the effect of removing brown marks, to do a good job of post-operative care, pay attention to daily sunscreen, avoid direct sunlight. 2. Topical drugs: you can choose to use hydroquinone cream, azelaic acid cream, inhibit the formation of melanin, play down melanin, reduce the effect of brown marks on the face, life should also pay attention to sun protection, avoid direct ultraviolet radiation. Brown marks left by trauma on the face, need to consult a doctor in a timely manner, under the formal guidance of the doctor for standardized treatment, do not take unauthorized medication.