The forehead has obvious black and white demarcation considerations and sun exposure and other physiological factors, vitiligo and other pathological factors, according to the cause of the disease can be improved through general treatment, drug therapy, physical therapy and other ways. 1. physiological factors: if the patient forehead part of the skin is always stimulated by sunlight, ultraviolet rays will make the skin melanocytes to the surface of the skin to move, and then release melanin, which led to the local skin black, at this time, the patient should pay attention to do a good job of sunscreen, usually pay attention to do a good job of skin moisturizing, if necessary, need to be through the laser and other physical ways of treatment. 2. Pathological factors: such as vitiligo, the occurrence of this disease and genetic, immune abnormalities, etc., the patient is mostly manifested as a piece or more white patches, and clearly demarcated from the normal skin, the patient can comply with the doctor’s instructions to use glucocorticoid preparations externally coated or systematic application, to help control the rapid progression of the disease; if the effect of medication is not good can be through the laser, phototherapy, masking agents and other treatments. For patients with obvious black and white demarcation on the forehead, it is recommended that they go to the dermatology department of a regular hospital, after clarifying the cause of the disease under the guidance of the doctor to actively treat it, and not blindly use medication to avoid damage to the skin. Drugs need to be used in accordance with medical advice.