In combination with age, if a postmenopausal woman has a thick endometrium, it is recommended to scrape the uterus to clarify the diagnosis; if a woman of childbearing age can first let the endometrium shed through medication after regular follow-up ultrasound, if repeatedly the endometrium is very thick, it is recommended to scrape the uterus to clarify whether the endometrium has lesions present. The endometrium changes regularly with the menstrual cycle, and the thickness of the endometrium changes dynamically during different menstrual cycles, mainly due to the influence of hormones. The endometrium is the thinnest at the time of menstruation, then gradually thickens to about 8mm around the time of ovulation, and can thicken to 14-16mm between menstruation (individual differences exist). Under normal circumstances, if a young woman has a simple thickening of the endometrium without abnormal vaginal bleeding, no family history of hereditary diseases (such as endometrial cancer, ovarian cancer and breast cancer), and is not taking drugs that may cause endometrial lesions (such as tamoxifen), the probability of endometrial lesions is generally low and can be temporarily observed and then reviewed. However, postmenopausal women should be very cautious, as ultrasound indicates that the thickness of the endometrium exceeds 4-5 mm, and even if there are no accompanying symptoms, active curettage or hysteroscopic exploration should be performed. For endometrial thickening, the need for curettage should be determined in conjunction with the symptoms and age of the patient.