If there is localized swelling and pain in the breasts, it may be due to the following reasons: 1. If there is a history of menopause, it may be caused by pregnancy, because the estrogen and progesterone hormones in the body will undergo relatively big changes after pregnancy. The mammary glands will change accordingly under the action of estrogen and progesterone, not only localized swelling and pain, but also localized enlargement of the breasts, the breasts will become relatively soft, and the nipples and areolas will also appear to be colored. Through the early pregnancy test, you may find a positive result; 2, due to endocrine disorders caused by breast hyperplasia, there will also be localized swelling and pain in the breasts, often without a history of menopause, swelling and pain when touching the breasts with your hands will feel the pain aggravated, so it is recommended to go to the hospital to do the appropriate examination, such as ultrasound or molybdenum target examination, to rule out organic lesions. If there is any abnormality, timely treatment.