It refers to chronic non-suppurative masses in different sizes and forms happening in the breasts of  women.Its clinical feature is mass in the bilateral or unilateral breast, accompanied by distending pain, unclear margin, obvious distending pain aggravated before menstruation and relieved after menstruation. This disease is most commonly seen in the middle-aged and young women at the age of 30 to 40 and its incidence decreases obviously after menopause. It is believed in Western medicine that endocrine dysfunction inside the woman's body is a main pathogenic factor. If it is not cured for long time, it can develop into mammary cancer in some patients. Therefore, sufficient attention must be paid to clinically.