Breast tenderness a few days before menstruation is caused by changes in female hormones in the body and is a normal phenomenon, so patients should not worry too much. Usually, after the onset of menstruation, the symptoms of breast swelling and pain in women will be reduced or disappear. However, if the pain is more severe and lasts longer, pathological factors should be suspected. When women experience breast pain before menstruation, it is mainly due to the fluctuation of hormone levels in the body, resulting in expansion of breast ducts, congestion and interstitial edema, which is normal and usually does not require treatment. With the onset of menstruation, hormone levels will decrease and the pain will gradually improve. If postmenstrual breast discomfort is more serious and there are hard lumps to the touch, it should be considered as a result of certain diseases. In this case, it is recommended that the patient go to the gynecology department for breast ultrasound and other related examinations in order to clarify the diagnosis and avoid delaying the condition. In addition, it is recommended that women maintain a good mood before menstruation, avoid straining, and increase nutrition to spend a healthy cycle.