Pubic hair is the hair that grows on the pubic area, most of which is black, and a few of which are white. The common reasons for the change of pubic hair from black to white are as follows: 1, endocrine disorders, common is the decline of ovarian function, resulting in lower levels of hormones in the body, pubic hair becomes white. 2, some diseases, a common disease is vulvar vitiligo, is due to the destruction of melanocytes in the hair follicle, resulting in the lesion of the site of the hair from black to white. 3, genetic diseases, such as albinism, this disease has a genetic predisposition, lack of melanin, the whole body skin and hair 4, malnutrition, the lack of trace elements, such as iron, zinc, etc., can also lead to hair whitening. 5, mental factors, excessive psychological stress, long-term mental tension may also lead to hair whitening.