After menopause, the thickness of endometrium will become very thin. If endometrial thickening with vaginal bleeding occurs, we should rule out endometrial cancer, the thickness of endometrial cancer is 18.2±6.2mm, if the thickness of endometrium is less than 4mm, the possibility of endometrial cancer is very low, endometrium 4-7mm is also dangerous, the possibility is higher if it is more than 8mm. The symptoms of endometrial cancer are not obvious in early stage, but with the aggravation of the disease, the symptoms of increased vaginal discharge, abnormal bleeding and lower abdominal pain will appear, and if there is uterine cavity infection, it will form fluid in the uterine cavity and cause abdominal pain, and when cancer cells invade the peripheral nerves, it may also cause lumbosacral pain. Endometrial cancer treatment is mainly surgery and chemotherapy is required after surgery. The earlier the cancer is detected, the better the treatment effect.