The following are the causes of excessive menstruation in clinical practice. I. Submucosal fibroids are caused by the growth of submucosal fibroids into the uterine cavity, so the endometrial area is relatively larger, which leads to increased menstruation and often prolongs the duration of menstruation and shortens the menstrual cycle. Second, because of abnormal blood clotting function, thrombocytopenia can also lead to increased menstrual flow in clinical practice. Third, due to endocrine disorders, if the estrogen is low, the endometrium is not able to repair as soon as possible, so it will lead to increased menstruation. In case of menopause, due to the menopausal condition, it can also lead to increased menstruation, which often needs to be treated with progestin in clinical practice.