The discomfort in the middle of the two breasts is considered to be caused by cystic breast hyperplasia, which is caused by ovarian dysfunction, imbalance in the ratio of estrogen and progesterone, resulting in breast hyperplasia and recurrence of incomplete breasts. Mostly seen in middle-aged women, it can be manifested as hyperplasia of the milk ducts, hyperplasia of the breast gland lobes, and hyperplasia of the surrounding fascia and adipose tissue. Clinical manifestations are breast discomfort before menstruation and disappearance of symptoms after menstruation. Some patients may find lumps before menstruation and the lumps shrink or disappear after menstruation. It is a benign disease and has no direct relationship with breast cancer. It can be observed clinically, and breast ultrasound, mammogram or breast MRI can be checked regularly. If the symptoms are mild, no special treatment is needed. If the symptoms are more severe and the breasts feel uncomfortable during the whole menstrual cycle, which affects rest and sleep, you can take medicines such as Phenytoin and Breast Fetish Elimination to treat the problem.