A very long white hair on the body may be caused by age and other physiological factors, followed by vitiligo, albinism and other diseases. 1. physiological factors: ageing, skin aging and other physiological factors may trigger the growth of white hair on the body, is a normal phenomenon. 2. Vitiligo: the cause of the disease is mostly related to melanocyte loss, immune system disorders, genetic factors and other factors may trigger the disease. Usually the skin white spots as the main manifestation, head and face vitiligo more white hair, some patients may appear white hair. 3. albinism: albinism patients are mostly manifested as a lack or reduction of melanin in the skin, hair color, white, pink and so on. Its cause is mostly due to abnormal melanin production, heredity and other factors. The cause of a very long white hair on the body is more reasons, it is recommended that patients seek medical examination to clarify the cause of the disease.