The phenomenon of breast swelling and pain before menstruation is called PMS in medical terms. PMS is more often caused by hormonal changes, so the first thing to do is psychological interventions, not to be too nervous and relaxed. Interventions in lifestyle, such as sleep patterns, eating habits, no spicy stimuli, and enough sleep. If there is swelling and pain in the breast during PMS, it is important to do a good screening of the breast to detect and rule out breast diseases at an early stage, and not to miss the examination and treatment of breast diseases because of PMS. In addition to psychological and lifestyle interventions, it is also necessary to strengthen exercise without going to pharmaceutical interventions. It is still important to do a good screening because there may be tension in the breast swelling and pain. For PMS, which can have many manifestations, such as other headaches, you can take some oral vitamin B6 to improve the nervous tension. In case of simple swelling and pain, just pay attention to improving your lifestyle, and also pay attention to observation.