It is normal to have a short period of mild swelling and pain in the breasts during ovulation because there will be a big change in the endocrine system during the ovulation period. The increase in estrogen will bring about changes in the body, and the milk ducts will be congested during this period, and excessive congestion will cause edema in the breast area, so there is a feeling of swelling and pain, the pain is relatively mild. The pain is mild. As estrogen secretion gradually decreases, the swelling and pain will slowly disappear. If the breast pain is severe and lasts for a long time, the possibility of breast disease cannot be ruled out. Suffering from breast hyperplasia and nodules, the pain is obvious when pressed and will be aggravated during ovulation. With uterine fibroids, there will also be breast swelling and pain, accompanied by vaginal discharge and irregular menstruation. If the pain is abnormal, it is recommended to go to the hospital to confirm the diagnosis. It is recommended to wear a suitable bra, keep emotional stability, and should not be angry frequently.