After pregnancy, the areola will become larger and darker. In the early stages of pregnancy, there is no obvious breast swelling and pain, especially in the middle and late stages of pregnancy, there is thickening of the milk ducts, manifested by granular nipples and accompanied by milk secretion. During this period, you will feel swelling and pain in your breasts, and the volume will gradually increase, and there will be obvious veins on the surface of your breasts, which are all physiological changes. Try to wear loose cotton underwear to reduce the pressure on your breasts, pay attention to washing your nipples every day, and if you have nipple invagination, you can gently pull them out of your body to prepare for breastfeeding after your baby is born.