The normal endometrium has a certain thickness, which varies during different periods of the menstrual cycle. If the thickness of the endometrium is within the normal range and the menstrual cycle and period are normal, then it is a normal endometrial thickness and does not require treatment. When the endometrium is abnormally thick and causes abnormal vaginal bleeding, then it needs to be checked. Abnormal thickening of the endometrium is usually seen as an overgrowth of the endometrium due to endocrine disorders. Endometrial thickening has three main risks for women: 1. abnormal vaginal bleeding. A common symptom of endometrial thickening is irregular vaginal bleeding, and if the bleeding is heavy, shock may occur, affecting life safety. 2. Causes female infertility. Thick endometrium caused by anovulation, vaginal bleeding affects sex life and makes it difficult for women to get pregnant. 3.Unusual endometrial thickening may be the precursor of precancerous lesions. Pathological examination should be performed after segmental scraping, and the pathology can diagnose what is causing the disease. In conclusion, abnormal thickening of the endometrium may cause abnormal vaginal bleeding, may affect conception, and may have a tendency of malignant transformation. It is recommended to go to the hospital in time for examination so that the cause can be clarified as soon as possible for targeted treatment.