The woman’s breasts are swollen and painful before menstruation: 1. It may be caused by the increase in the level of estrogen and progesterone secreted by the ovaries during this period, and these two hormones will promote the growth and development of the mammary ducts and follicles, so the whole breast will appear to be swollen and painful. 2. The most important thing is that you should be able to get a good idea of what you are doing. Therefore, if a woman’s breasts are swollen and painful and the pain is relieved after her period, it is a normal physiological phenomenon. If you still have swelling and pain after your period, you need to go to the hospital for an ultrasound examination of the breast to rule out the existence of breast disease and, if necessary, to give medication or surgery for treatment.