The forehead skin is whiter than the surrounding can be divided into physiological and pathological, pathological causes are vitiligo, white furfur, florid chaff rash and other diseases. 1. physiological: if the haircut hairstyle design into bangs, or forehead often wear decorations or sun shading items, it may be due to the reduction of ultraviolet irradiation, the forehead skin than the surrounding white situation, this is a normal physiological phenomenon, no additional treatment. 2. Pathological: If you suffer from skin diseases, such as vitiligo, white chaff, florid chaff rash, leprosy, tuberous sclerosis and other diseases, will be due to local skin pigmentation or disappearance of this performance. If you suspect that this symptom is pathological, it is recommended to go to the hospital in time.