The hair is a part of the whole body hair, also with the growth of age gradually become white, is a normal physiological changes. 30 years old pubic hair turn white if only a part or a to a few hair turn white, may be due to this part of the hair follicle melanin and melanin secretion is insufficient, thus causing uneven hair turn white, this is a normal physiological situation, do not worry too much. However, if the quantity and range of whitened pubic hair is relatively large, we should consider whether it is related to the following factors: 1, genetic: some of the population due to genetic factors, the appearance of hair whitening earlier; 2, vitiligo: early can be manifested as pubic hair whitening, local skin will also appear changes, become milky white or light pink, no pain, consider vitiligo; 3, other factors: mental factors, etc. may also lead to early whitening of pubic hair.