Menstruation in the elderly, that is, postmenopausal uterine bleeding, may be seen in malignant tumors or benign lesions, such as uterine infections, uterine foreign bodies, and so on. 1. Malignant tumor: postmenopausal uterine bleeding is suspected to be malignant tumor, such as endometrial carcinoma, cervical carcinoma, ovarian carcinoma and so on. Elderly people should not have menstruation after menopause, once there is vaginal bleeding, they need to go to hospital for examination in time. 2. Infection in the uterine cavity: due to the decline of ovarian function, the level of estrogen decreases, the vaginal wall atrophies, the mucous membrane becomes thin, the local resistance decreases, the pathogenic bacteria are easy to invade and reproduce and cause inflammation, and the inflammation along the upper edge of the uterus is easy to cause inflammation of the endometrium and so on, which will lead to a small amount of bleeding in the vagina. 3. Uterine foreign body: because after menopause, the birth control ring is not taken out in time, the uterus atrophy, the birth control ring in the uterus relative enlargement, stimulate the endometrium lead to vaginal bleeding phenomenon. Postmenopausal uterine bleeding may also have other causes, must go to the hospital in time to clarify the diagnosis, after diagnosis under the guidance of the doctor active treatment, so as not to delay the condition.