In clinical practice, I often hear complaints from female friends that they experience breast tenderness before menstruation. What exactly is the cause of this? Mild breast tenderness may be due to hormonal changes in the body, which is a normal physiological condition. Of course, it could also be caused by diseases, such as the most common fibrocystic breast change, which is associated with cyclical breast pain during the menstrual cycle. There are also other diseases that can cause cyclical breast pain, and it is important to pay attention to them. Especially in cases of severe pain, or when even light touch causes significant discomfort, we recommend visiting a hospital for relevant examinations as soon as possible.