Ms. Wang, 34 years old, was found to be anemic with a hematocrit of only 90.0g/L. When she was asked why she did not come to the clinic, she said that she had heavy menstruation since she was a child, and she was usually easily fatigued and loved to catch a cold, but she did not know that she needed treatment. There are many patients who come to the gynecology clinic for abnormal menstruation, and most of them come to the doctor because their menstruation has become less frequent and darker, while many patients who have heavy menstruation and even anemia do not come to the doctor, or refuse to receive treatment. The reason why patients do not see a doctor or do not receive treatment is that they think that it is normal to have heavy periods and that it is not normal to have light periods. What is normal menstruation? Most women have regular menstruation after puberty, and a normal menstrual cycle is one that lasts from 24 to 35 days, about 2-7 days each time, with a menstrual volume of about 20-60 ml. More than 60 ml is too much, and more than 80 ml is clinically diagnosed as excessive menstruation. anemia will occur. A woman suffering from anemia, in addition to gastrointestinal diseases such as ulcerative diseases, is most often caused by excessive menstrual flow. These patients often feel a decrease in resistance and are easily fatigued, which can increase the burden on the heart for a long time and is very harmful to physical and mental health. The causes of excessive menstruation may be related to gynecological diseases such as uterine fibroids, endometriosis, adenomyosis, and also to blood disorders such as idiopathic thrombocytopenia and the use of anticoagulants. If no uterine or systemic disease is found, idiopathic menorrhagia is diagnosed. Heavy menstrual flow is a common reason for undergoing hysterectomy in gynecology, but there are various treatments for idiopathic heavy menstrual flow, such as taking antifibrinolytics during menstruation, or oral short-acting contraceptives, or placing a progestogen-loaded birth control device in the uterus can reduce menstrual flow. When conservative treatment does not work, surgery is then considered.