The long white pubic hair may be physiological factors, but also may be the manifestation of certain diseases, such as malnutrition, sclerosis atrophic moss, vitiligo, etc., should be timely consultation to find out the cause of the disease. 1. physiological factors: human body pubic hair and hair, with the age change function gradually degradation, hair and pubic hair will appear white phenomenon, is a normal physiological process. 2. Pathological factors: (1) malnutrition: if there is malnutrition, it will also lead to insufficient supply of nutrients to the pubic hair, and there will be whitening of pubic hair. (2) Sclerosing atrophic moss: manifested as itching, atrophy, whitening of the skin and pubic hair of the vulva and perianal skin, belonging to the skin disease related to immunity. (3) Vitiligo: If vitiligo occurs in the vulva, it may lead to whitening of pubic hair, but unlike sclerosing atrophic moss there is usually no itching or skin atrophy. If you exclude physiological causes, you should promptly consult a doctor to specify the cause of the disease and, if necessary, carry out appropriate treatment.