Fresh blood from the uterus needs to be looked for depending on the situation. If the bleeding occurs after intercourse, it is contact bleeding and may be caused by cervical polyps. If you are menstruating, it is normal for uterine bleeding to start on the 2nd-3rd day. The bleeding will gradually decrease and stop in 4-5 days, which is a normal physiological phenomenon. If uterine bleeding occurs after an abortion, the amount of bleeding is relatively small and does not exceed the amount of menstruation, then it is normal, and it can be ended naturally in a week or so. If the uterine bleeding occurs suddenly after abortion or childbirth, and the amount is relatively large, it is necessary to go to the gynecologist in time. Then you need to go to the gynecology department of the hospital in time, do ultrasound and other aspects of the uterus to see if there is any embryonic tissue left in the uterine cavity, and so on.