A white hair above the eyebrow is considered to be due to age aging, malnutrition, halo nevus and other factors. 1. Age aging: some patients may be due to age aging, the body’s functions will decline, which will cause the body’s melanin deficiency, so there will be hair whitening, manifested in the eyebrow above the growth of a white hair. 2. Malnutrition: If the patient is often picky about food, in the case of long-term nutritional intake is insufficient, it may cause abnormal development of the hair follicle, melanin deficiency, resulting in the phenomenon of eyebrow hair above a white hair. 3. halo nevus: this is a pigment loss disease involving a variety of cells, manifested as a circle of limited hypopigmentation around the pigmented nevus, belonging to one of the types of vitiligo, will cause the phenomenon of a white hair above the eyebrows. The reason for this is the fact that there are other reasons for the growth of a white hair above the eyebrow, so it is necessary to cooperate with the doctor to improve the relevant examination, to determine the cause, and then make the symptomatic treatment, can not blindly use the drug, in order to avoid the adverse effects.