Many women experience breast tenderness on a regular basis. After a long period of observation and research, clinicians have found that there are six main types of breast swelling and pain in women. 1, adolescent breast pain: usually occurs at the age of 9 to 13 years old, after the first period, the pain will disappear on its own. 2, premenstrual breast pain: there are many women before the onset of menstruation have breast swelling, hardness, pressure pain; heavy breasts by a slight shock or collision will swell pain uncomfortable. This is due to the increase in estrogen levels in the body before menstruation, breast enlargement, edema between the breast tissue caused. After the onset of menstruation, the above changes can disappear. 3, breast pain during pregnancy: some women in about 40 days of pregnancy, due to the placenta, villi secretion of estrogen, progesterone, prolactin, resulting in the enlargement of the mammary glands, and breast pain, heavy can last throughout pregnancy, without treatment. 4, postpartum breast pain: 3 days to 7 days after childbirth often appear double breast swelling, hard nodes, pain. This is mainly due to lymphatic retention in the breast, venous filling and interstitial edema and breast duct irregularities. 5, breast swelling and pain after abortion: these are due to the sudden interruption of pregnancy, the body’s hormone levels suddenly drop, so that the newly developed breasts suddenly stop growing, resulting in breast blocks and breast pain. 6, breast 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 engorgement, swelling will not easily subside, or subside incomplete, persistent engorgement will make the breast swelling pain. Women do not need to worry about this, but for the swelling and pain for a long period of time is not relieved, or even more and more serious, or when touching the breast, found uneven, unclear edge, poor mobility of the lump, then you should go to the hospital early examination and treatment.