In this case, diagnostic scraping is routinely done to get the endometrium down for pathological examination, because in the menstrual cycle of women, the endometrium is usually thickest before menstruation, about 10-12 mm. if there is an endometrium of 21 mm, most of this situation indicates that the endometrium is overgrown, but of course, this is finally The diagnosis is based on the results of pathological examination. Most of these patients will have excessive menstrual flow and large blood clots. If the pathology report indicates that the endometrium is hyperplastic, medication will be required.