There are many reasons for nipple darkening, and the specific treatments are as follows: 1. Physiological phenomenon. The nipples of young unmarried women are pink, but after pregnancy, due to the increase of melanin, the color of nipples and areola will deepen, which is a normal phenomenon, do not have to worry. You can eat more fruits and vegetables, supplement vitamin C, and wear loose underwear. 2, pathological phenomenon. Menstrual irregularities lead to nipple darkening, such as uterine disease, ovarian disease or breast disease, resulting in menstrual irregularities, nipple darkening, need to actively treat the original disease. If it is endometrial thickening, you need to maintain a light diet, low-fat and low-salt diet, and keep your mind stable. If it is polyovarian syndrome, progesterone intramuscular injection can be carried out, and the uterus can be removed if the age is over 40 years old. If it is breast cancer, surgery and other subsequent treatments, such as chemotherapy, may be needed.