There are many reasons why women’s nipples are black, the specific analysis is as follows: 1, pigmentation, congenital nipple black is a normal phenomenon, do not worry. 2, endocrine disorders, such as mental stress or rest, diet patterns lead to endocrine disorders, the performance of the nipple black, you can adjust the Chinese medicine. 3, sexual maturity, after puberty development nipple color will become darker, the performance of the nipple black is normal. The color of the nipples will deepen, and after weaning the nipples will slowly recover. 5, multiple pregnancy experience, each pregnancy breasts will become larger, nipple color becomes darker, more pregnancies, the nipples will become darker.