The nipple color of pregnant mothers will become darker after pregnancy, which is related to the increase of hormone levels in the body. Generally, after 6 weeks of menopause, the levels of estrogen, progesterone and chorionic gonadotropin in the body will increase. Under the action of estrogen and progesterone, pregnant mothers’ breast follicles will proliferate, and the lobules of the breast will also proliferate, and then the breasts will enlarge. At this time, pregnant mothers will have mild swelling and pain in the breasts, nipple pain will also occur, and the examination will find that the nipple color becomes darker, which is related to the hormone level changes in the body of pregnant mothers after pregnancy. This is related to the hormonal changes in the pregnant mother’s body. So don’t worry if your nipples become darker in color, it is a normal reaction to pregnancy, and Montgomery’s nodules will also appear in the areola, which is also a normal reaction.