After menopause, menstruation did not come for a few years and now it comes back for more reasons, considering cervical polyps, endometrial polyps, cervical cancer and other diseases and other causes. 1. Cervical polyps: the etiology of cervical polyps is still unclear, and may be related to chronic inflammatory stimulation of the cervix, cervical infection and other reasons. Patients may show vaginal bleeding after menopause. 2. Endometrial polyps: the cause of endometrial polyps is not clear, and may be related to high estrogen levels in the body, the uterine cavity and other factors. Patients may have postmenopausal vaginal bleeding. 3. Cervical cancer: cervical cancer is mainly caused by human papillomatosis infection, and patients may have symptoms such as postmenopausal vaginal bleeding, bloody or white vaginal discharge. 4. Other diseases: patients who have menstruation after menopause may also be related to endometrial cancer, senile vaginitis, ovarian cancer and other diseases. There may be other reasons why menstruation does not occur for several years after menopause and now it comes again. Patients need to seek medical treatment in time and complete relevant examinations, and the doctor will choose appropriate measures for the cause of the disease, so as to avoid delaying the condition.