Endometrial thickness is closely related to the menstrual cycle. If the ultrasound examination is performed in the first half of the menstrual cycle, i.e. just after menstruation, the limit is usually 0.8 cm, and if it is exceeded, endometrial thickening is considered. If the endometrial thickness of 1.3 cm is measured, the endometrial thickening is relatively more serious. If the ultrasound examination time is in the second half of the menstrual cycle, that is, when the menstruation is about to start, usually the endometrial thickness is 1.4cm as the boundary, beyond which endometrial thickening is considered, at this time the endometrial thickness of 1.3cm is normal and does not require special treatment. Endometrial thickness of 1.3 cm in the first half of the menstrual cycle should be further examined by hysteroscopy. Endometrial polyps are sometimes seen under hysteroscopy, and hysteroscopic removal of endometrial polyps is feasible, and the extracted material is sent for pathological testing to clarify the diagnosis. After the hysteroscopy, a routine full-scale curettage is performed, after which a pathology test is sent to clarify the presence of endometrial lesions and decide the next step based on the pathology results. If the pathology test is normal, it can be followed up and observed. If the pathology test results suggest endometrial hyperplasia, progestin therapy is usually given, usually half a cycle of progestin therapy after menstruation for simple hyperplasia, or a full cycle of progestin therapy for complex hyperplasia. If the pathological test results suggest atypical endometrial hyperplasia, hysterectomy is required if there is no fertility requirement, and high-dose progestin therapy can be given to those who insist on preserving fertility. If the pathological test results suggest endometrial cancer, the standard treatment for endometrial cancer should be followed, i.e. surgery and radiotherapy.