Breast swelling and pain in late pregnancy is caused by changes in hormone levels in the body, which is a normal physiological reaction and usually does not require treatment. If the symptoms are obvious, you can relieve them through massage or hot compresses. Late pregnancy due to higher levels of estrogen and progesterone may stimulate breast growth or enlargement in preparation for lactation, resulting in symptoms of breast swelling and pain. This is a normal physiological reaction of the body and generally does not require treatment. If breast swelling and pain is more obvious in late pregnancy, you can relieve the symptoms by applying hot compresses or massaging the breasts. Wear loose fitting underwear and avoid squeezing the breasts to avoid breast pain. Dietary advice is to eat foods rich in high protein and vitamins, and to take regular checkups to observe the development of the fetus. If breast swelling and pain occurs in late pregnancy and the symptoms are obvious, it is recommended to go to the hospital for examination and treatment in time.