Girl nipples black may be a normal phenomenon, may also be affected by disease, non-disease factors caused by black nipples generally do not require special treatment, if it is caused by breast disease, you can go to the appropriate department for examination, clear diagnosis and treatment: 1, high hormone levels: due to the higher levels of estrogen in girls, and nipples are more sensitive to estrogen, most women to sexual maturity, nipple color will naturally become darker; 2, pigmentation: over-stimulation of the nipple, wearing rough underwear, often subjected to local friction, can also cause melanin deposition, resulting in black nipples; 3, genetics: if there are relatives in the family or mother’s nipples are darker, due to genetic factors, they may also have black nipples; 4, breast disease: women’s nipples darkening may not be a change in skin color, the Rather, there is a bloody discharge that causes the nipple to become visually black. Generally, eczema-like carcinoma of the nipple and breast cancer can have such changes, along with other abnormalities such as nipple invagination and irregular breast lumps, the skin of the breast can also change, which needs to be taken seriously and should be seen in the thyroid breast surgery or general surgery department of a regular hospital to determine the cause through ultrasound and other imaging examinations to prevent delayed treatment.