Black marks appear after oil burns disappear time varies from person to person, the degree of burns is relatively light patients usually about 3~6 months time will gradually disappear, appear such a situation is recommended to consult a doctor in a timely manner. Local skin burned by the oil will appear black marks, that is, melanin, burns the situation of the patients in general about 3 ~ 6 months time will disappear, individual patients may need 1 ~ 2 years or even longer. Hyperpigmentation, to avoid the affected area of the skin exposed to direct sunlight, otherwise it will make the melanosis more serious, not conducive to recovery. Black marks after oil burns need timely medical attention, can be used under the guidance of the doctor azelaic acid cream, hydroquinone cream, tranexamic acid, vitamin C and other drugs to improve, can to a certain extent to promote the recovery and improve the situation of local skin black marks. When such a situation occurs, it is necessary to go to the hospital in time for treatment, and choose the appropriate treatment according to the doctor’s advice.