The correct name for menstruation coming back on the body after two years of menopause is vaginal bleeding after two years of menopause, which is commonly caused by uterine sarcoma, cervical cancer, endometrial cancer and so on. 1. Uterine sarcoma: the invasion of undifferentiated uterine sarcoma into the uterine cavity is often accompanied by hemorrhagic necrosis, which is manifested as irregular vaginal bleeding. 2. Cervical cancer: polyps or cauliflower-like cervical organisms are common in the cervix, often accompanied by infection, brittle and easy to bleed, often manifested as bleeding during sex and painful intercourse. 3. Endometrial cancer: Cancer tissue grows rapidly and is rich in blood transportation, which will show the symptom of ulceration and necrosis, and then flow out from the uterine cavity and manifest as vaginal bleeding. It mainly manifests as postmenopausal bleeding, and the amount is usually small. If vaginal bleeding occurs two years after menopause, it is necessary to consult a doctor in time, and further treatment or therapy is needed after the cause is clarified under the doctor’s guidance.