Menopause half a year to remove the IUD and then menstruation may not be completely menopausal, which is a normal phenomenon, or it may be caused by diseases of the reproductive system, which is an abnormal phenomenon. 1. Not completely menopausal: If a woman has been menopausal for more than half a year and has vaginal bleeding again, it may be a sign of incomplete menopause. Menopause is a retrospective diagnosis. If you are of age and have not had a period for a year, hormone levels indicate menopause, and menopause can be determined. Six months without menstruation and no assessment of ovarian function cannot be called menopause, and under normal circumstances, menstruation may occur again. 2. Reproductive system diseases: menstruation for more than half a year to remove the ring and then menstruation may be caused by senile vaginitis, endometritis, endometrial polyps, uterine submucosal leiomyoma and so on, which is not normal. In addition, gynecological malignant tumors such as ovarian malignant tumor, cervical cancer, endometrial cancer, etc., will also have bleeding, which is abnormal. Patients should be alert and it is better to go to the hospital for treatment. Patients are advised to see a doctor as soon as possible and be examined and evaluated by a gynecologist. The cause of the disease should be clarified, and observation or further consultation should be chosen according to the cause.