Endometrial cancer is not judged entirely according to the thickness of the uterine lining. Usually, those with a lining thickness of 1.5-2.5cm and abnormal echoes are at a higher risk, but those with a lining that is not thick also have endometrial cancer. The thickness of the uterine lining changes according to the stages of a woman’s physiology. Generally, the thickness of endometrial lining of post-menopausal women is much thinner than that of women of childbearing age. If the endometrial lining of the uterus is thickened and accompanied by symptoms such as vaginal bleeding, one should be highly alerted to the risk of endometrial cancer. Early symptoms of endometrial cancer are usually atypical, and as the condition gradually aggravates, there will be symptoms such as increase in vaginal secretion, accompanied by abnormal bleeding, and some patients will also have pain in lower abdomen and lumbosacral region. Surgery is the main treatment for endometrial cancer, and radiotherapy and/or chemotherapy is needed after surgery according to individual conditions. The earlier it is detected, the better the treatment effect will be, and the specific treatment can be consulted with professional doctors. Therefore, women should have regular gynecological checkups to avoid missing the best time for treatment.