What is the pain in the nipples before menstruation?

Menstruation usually refers to menstruation. Premenstrual nipple pain, in general, and hormone changes, nipple damage, breast hyperplasia and other factors related. 1, hormone changes in the menstrual cycle, especially after ovulation, estrogen and progesterone levels in the body may lead to breast tissue congestion, edema, and then cause breast and nipple sensitivity and pain, and this pain is usually reduced after the start of menstruation. 2, nipple damage nipple by external stimulation, pressure or damage, such as the wrong wearing bra, breast massage or nipple friction, may also cause nipple pain. 3, breast hyperplasia can lead to nipple and breast pain, and in menstrual cramps before the hormone level fluctuations are more obvious, can lead to this pain is more obvious.