Having regular health checkups can effectively prevent the chance of breast cancer. Health checkups include self-examination of breast and hospital checkups, including doctor’s experience and related auxiliary examinations, such as mammogram and ultrasound. This is very helpful for prevention, early detection and early treatment of breast cancer. Young women should maintain a healthy lifestyle, including a healthy diet, a more optimistic spirit, artificial breastfeeding for women with children, etc. A healthy lifestyle is very important for the prevention of breast cancer. If you experience the following breast swelling and pain, you should seek early medical attention to prevent and treat breast cancer. Breast swelling and pain during pregnancy Some women secrete a lot of estrogen, progesterone and prolactin after 40 days of pregnancy due to the placenta and chorionic villi, resulting in breast enlargement and breast enlargement, which can last for the whole pregnancy without treatment. Postpartum breast swelling pain 3-7 days after childbirth can often be full, hard, painful breasts. This is mainly due to lymphatic retention in the breast, venous filling and interstitial edema and poor milk ducts. Prevention and treatment: breastfeeding as early as possible. If there are hard knots, you can apply hot compresses and massage the hard knots before breastfeeding; you can also use a breast pump to attract milk to promote the smooth flow of milk ducts. After abortion, some women complain of breast swelling and pain, and lumps can be palpated. This is due to the sudden interruption of pregnancy and the sudden drop of hormone level in the body, which makes the newly developed breast suddenly stop growing, causing breast lumps and breast pain. Breast swelling and pain after sex This is related to the physiological changes in the breast during sex. Sexual indifference or sexual disharmony, because of the failure to achieve sexual satisfaction, breast congestion, swelling is not easy to subside, or subside incomplete, persistent congestion will make the breast swelling pain. Therefore, women should pay attention to a good sex life, no orgasm or indifferent libido should go to the doctor.