The normal range of menstrual flow is between 20 and 60 ml, usually more than 80 ml is considered excessive menstrual flow. Menstruation is caused by cyclic shedding of the endometrium and bleeding, and menstrual flow refers to the total amount of bleeding in one menstrual period. Excessive menstrual flow is generally indicative of endometrial polyps, endometrial hyperplasia, fibroids and other diseases, and patients show symptoms such as increased menstrual flow, prolonged menstrual period and anemia. Some patients may also experience increased menstrual flow due to physiological factors such as fatigue and cold. It is recommended that patients should consult a doctor in time when they realize that their menstrual flow is increasing, and take active treatment under the guidance of specialists in regular hospitals, so as to avoid delaying their condition.