Endometrial cancer occurs at any age, but it is basically a kind of tumor in older women, and the age of onset is mostly 50-59. Various types of uterine bleeding are the most prominent symptoms of endometrial cancer, and its main manifestations are: 1. Vaginal bleeding 70-75% of patients with endometrial cancer are postmenopausal women, and more than 90% have vaginal bleeding. The amount of vaginal bleeding varies, generally it is not much, but there are less cases with heavy bleeding. About 20% of endometrial cancer patients are perimenopausal women. Another 5% are women under 40 years old, so some of them also show perimenopausal vaginal bleeding: disruption of menstrual cycle, prolonged or increased menstrual period, or irregular vaginal bleeding. When combined with uterine cavity infection or pus accumulation, the discharge may be purulent or purulent, sometimes with a foul odor. 3.Pain Usually does not cause pain. A few patients have pain in the lower abdomen, which is persistent or distended, and may be related to the large lesions that have entered the uterine cavity and stimulated contracture of the uterine cavity. The pain is more obvious when there is fluid or pus accumulation in the uterine cavity or when the advanced cancer infiltrates the surrounding tissues or compresses the nerves. The pain is persistent in the lower abdomen, lumbosacral region and legs. Patients with endometrial cancer usually have obesity, diabetes mellitus and hypertension, so if the above conditions occur, they must be alert to the occurrence of endometrial cancer; they should go to hospital for examination as soon as possible. Gynecological examination is normal in the early stage of pelvic examination, but abnormalities can be detected early through ultrasound, and signs of enlarged uterus, adnexal mass, anemia, emaciation, cachexia and distant metastasis can be found only in the late stage. If endometrial cancer and its precancerous lesions are suspected, hysteroscopy and localized biopsy combined with histopathological evaluation are applied. Hysteroscopy is a new, minimally invasive gynecological treatment technology in recent years, which can directly observe the location, size, appearance and scope of lesions in the uterine cavity and take materials under direct vision, which can greatly improve the accuracy of diagnosis of diseases in the uterine cavity; and hysteroscopic surgery does not require opening the abdomen and has It has the advantages of less pain, less bleeding, shorter operation time and fewer complications.