There are several reasons why women experience chest pain during menstruation: 1. Consider endocrine disorders during menstruation, changes in the content of progesterone, stimulation of the chest and the resulting chest pain, which can be treated without. This phenomenon may occur before the start of the menstrual period and will slowly disappear after the end of the period. 2. Consider that it is caused by breast diseases, such as breast enlargement, mastitis and other diseases, and breast tumors and other diseases may also lead to chest pain, which requires specific examination and treatment. 3. The pain of chest pain during menstruation may be caused by vibration or collision of the breasts, mainly caused by trauma. It is best not to squeeze your breasts excessively in normal times. It is advisable to observe the symptoms of the breast in time, and if there is trauma, it is best to carry out treatment in time.