There is no obvious lump in the breast, but often pain, the main reason in the clinic is caused by breast hyperplasia, in the menstrual cycle and the process of menstruation, pain is more obvious, and when it is serious, it will affect the work life and sleep, mainly due to the changes in the body of estrogen and progesterone in the middle of menstruation, due to the imbalance of phenomena will be produced in the role of estrogen in the breasts produced by hyperplasia, and accompanied by swelling, pain. Often appear in the menstrual cycle, can consider the application of drug treatment, clinically commonly used drugs are red gold elimination capsule, breast fetish elimination. For more obvious pain, you can also consider giving pain-relieving drugs, such as Fenpropidol, which will significantly reduce the pain before or during menstruation.