At 10 weeks of pregnancy, the breasts may become more and more swollen and painful, or there may be a gradual decrease in the symptoms of breast swelling and pain. During the 10th week of pregnancy, the level of various sex hormones in the pregnant woman’s body gradually rises, which may cause breast tissue proliferation and expansion of the milk ducts, which may cause the breasts to become more and more swollen and painful. This may be normal and does not require special treatment. Each pregnant woman has different sensitivity to the increase of sex hormone level in her body, and the symptoms of breast swelling and pain are also significantly different. Some pregnant women may experience a gradual reduction of breast swelling and pain after 10 weeks of pregnancy. Pregnant women need to undergo regular pregnancy checkups to check on the health of their babies and pregnant women. If the symptoms of breast swelling and pain are more obvious, you need to go to the obstetrics and gynecology department of the hospital in time.