Postmenopausal bleeding, or vaginal bleeding that occurs after menopause, is relatively common in clinical practice. The main cause of vaginal bleeding is due to some problems with the vagina, cervix and endometrium before it occurs. Specifically: 1. If a small amount of vaginal bleeding occurs after menopause, it may be due to a short-term shedding of the endometrium under estrogen stimulation, or atrophic vaginitis. If there is recurrent vaginal bleeding in larger amounts or contact bleeding, think of a possible cervical disease or endometrial disease. Cervical disease is an inflammatory disease or cervical cancer. 2. Vaginal bleeding can also occur when endometrial cancer or endometrial polyps appear in the endometrium. For example, endometrial polyp will be seen as an occupancy inside the uterine cavity during ultrasound. Alternatively, hysteroscopy can be performed, and clinical guidelines now recommend hysteroscopy as the first choice for postmenopausal vaginal bleeding. Currently, the incidence of hypertension and diabetes is very high due to poor dietary habits in our country. Therefore, the risk factors for endometrial cancer are the three highs, hypertension and diabetes, and the lack of pregnancy and breastfeeding in previous family planning are all high-risk factors, so the incidence of endometrial cancer is on the rise. We must pay attention to vaginal bleeding after menopause. People think that a small amount of bleeding after menopause is not relevant, but in fact, it sometimes delays the disease, and even we often encounter some patients who are in advanced stage of endometrial cancer when they come to the hospital clinically. The prognosis of endometrial cancer is very good, the treatment effect is very good, if treated early, it does not affect the life, the five-year survival rate can reach 100%, so we must pay attention to postmenopausal vaginal bleeding and be especially alert to the appearance of this phenomenon.