Bleeding from endometrial cancer may be bright red, dark red or black, and there is no exact standard. Endometrial cancer is an epithelial malignant tumor that occurs in the endometrial area of the uterus and is usually characterized by vaginal bleeding and menstrual disorders as clinical symptoms. Early stage patients may have irregular vaginal bleeding, but the bleeding is not heavy and may be characterized by a small amount of bloody leukorrhea. Most of them occur in peri-menopausal or post-menopausal women, with the development of the disease, the color of vaginal bleeding may be bright red, or dark red phenomenon cannot be ruled out, and in the late stage, local infection and necrosis may also occur, and foul-smelling pus and blood-like liquid may be discharged. For endometrial cancer, patients should pay great attention to the disease, early detection and early treatment should be done to improve the prognosis of patients.