Most pregnant women experience breast pain around 42 days after pregnancy, when the breasts enlarge, harden and darken the areola. After pregnancy, due to changes in hormone levels in the body, increased levels of progesterone and estrogen will stimulate breast development, and most pregnant women will experience breast pain around 42 days after menopause. However, because of the differences in each person’s physical condition or changes in hormone levels in the body, some pregnant women may experience breast pain after pregnancy for a period of time that is significantly less than or greater than 42 days, but the swelling and pain of the breasts will gradually improve after 3 months of pregnancy. Women who experience breast pain during pregnancy are advised to try to wear loose underwear to avoid squeezing and stimulating the breasts; hot compresses with towels can also be used to alleviate breast pain, and attention should also be paid to keeping the breasts clean. In addition, pregnant women should try to eat a light diet, avoiding spicy, greasy and cold foods.