Menorrhagia is a common disease in perimenopausal women, which is characterized by prolonged periods or excessive blood loss, usually more than 80 ml of blood per cycle, but most women do not realize that they have this disease, and some women do not treat it even though they are aware of it. Uncontrolled excessive menstruation can lead to varying degrees of anemia, which can cause problems in daily life and work. Medication is the traditional treatment method, which has the disadvantage of requiring the patient to take medication regularly for a long time and has its side effects. Progestin-containing birth control rings such as Mannedol are effective for some women with excessive menstruation. Removal of the uterus can effectively solve the problem of excessive menstruation, but the hysterectomy surgery time and recovery period is long, and it usually takes 2-3 months of rest after surgery to resume normal work and life. Nosur has a great advantage for the management of excessive menstruation caused by other diseases, such as hematological diseases, uremic kidney transplantation, patients with other diseases that cannot tolerate a long operation. It is a fast, safe and easy to operate endometrial resection procedure, which removes the endometrium by radiofrequency energy to control the purpose of excessive menstruation, based on the principle of impedance control, using radiofrequency energy to vaporize the endometrium, with the elimination of the endometrium, the tissue impedance increases, and when the impedance rises to the depth of resection exceeds the superficial muscle layer, the operation is automatically stopped, This means that the endometrium has been completely vaporized and eliminated. The average treatment time of Nosur is about 90 seconds and can be done on an outpatient basis. According to the literature, the rate of menstruation reduction after Nosur surgery is 90% compared to the preoperative rate, and the rate of amenorrhea can reach 50%. The post-operative recovery time is fast, without the side effects of hormone therapy and the trauma of hysterectomy. Most women can walk in and out of bed immediately after surgery and resume their normal work and life soon. The indications of Nosur: Nosur endometrial resection by removing the endometrium to treat perimenopausal, or women without reproductive needs benign causes of excessive menstruation. With the elimination of the endometrium, the tissue impedance increases, and when the impedance rises to the depth of excision beyond the superficial muscle layer, the operation is automatically stopped, indicating that the endometrium has been completely gasified and eliminated. With the elimination of the endometrium, the tissue impedance increases, and when the impedance rises to the extent that the resection depth exceeds the superficial muscle layer, the set automatically stops operation, indicating that the endometrium has been completely vaporized and eliminated.