One year after menopause and then menstruation is not necessarily cancer, it may be caused by vaginal inflammation, endometrial polyps and so on, do not be too nervous. 1. Vaginal inflammation: women who have vaginal bleeding after menopause may have vaginal inflammation, which is mainly caused by the decrease of estrogen level in the body, leading to the decrease of vaginal secretion, which in turn leads to vaginal dryness and bleeding, and can be effectively relieved through the use of topical estrogenic drugs. 2. Endometrial polyps: After menopause, if women have endometrial polyps, it may cause vaginal bleeding and patients think it is menstruation, in this case, it is recommended to perform hysteroscopic endometrial polyp removal surgery. 3. Cervical cancer: women who have vaginal bleeding after menopause may have the possibility of cervical cancer, and it is recommended to improve the relevant examination in time to make a clear diagnosis. If a woman experiences frequent bleeding after menopause, it is recommended to consult a doctor in time for symptomatic treatment.