If before menstruation, there is a swelling and pain in both breasts, surely there is no pregnancy, mainly due to the relatively high secretion of estrogen in the body, while the secretion of progesterone is relatively insufficient to cause the swelling and pain in both breasts. In this case, it is best to go to the hospital for examination to rule out cystic hyperplasia of the breast. In addition, clinically, this patient is often accompanied by mood swings, more sensitive, easy to get angry, and have insomnia before menstruation, can be given to the free pill orally, and it is recommended to start from the week before menstruation orally, for three consecutive treatment of the menstrual cycle, which can significantly relieve the situation of breast swelling and pain in the pre-menstrual period, you can also take oral vitamin B1, B6 to relieve the situation.