The difference between cervical cancer bleeding and menstruation mainly lies in the site of bleeding, regularity, amount and character of bleeding. 1. Bleeding site: cervical cancer bleeding is due to contact bleeding caused by cervical tumor or bleeding caused by invading large blood vessels. Menstruation is exfoliative bleeding of endometrium. 2. Regularity of bleeding: bleeding of cervical cancer is often irregular, mainly contact bleeding or irregular bleeding after sexual intercourse. Menstruation has cycle regularity. 3. Amount and character of bleeding: the amount of bleeding of cervical cancer often varies with the size of lesion and the invasion of blood vessels. It may manifest as spot bleeding after sexual contact or irregular hemorrhage. At the same time, if accompanied by infection, bleeding can be accompanied by vaginal discharge with fishy odor as thin as water or rice slop. Menstruation is dark red non-clotting blood that is relatively regular and moderate in amount each time. However, it should be noted that cervical cancer may also manifest as prolonged or increased menstrual periods. It is recommended to consult a doctor in time to clarify the disease and treatment after gynecological examination and other tests.