The increase in blood volume on the fifth day of abortion may be caused by incomplete abortion, poor uterine contraction, infection, etc. According to the different reasons, we will give you the treatment of purging the uterus, promoting uterine contraction, and anti-infection. 1. Incomplete abortion: the uterus position is too flexed, or the number of days of menopause during abortion is too large, resulting in the retention of pregnancy tissues, causing heavy bleeding after abortion, or more bleeding after bleeding stops. Ultrasonography can clarify the diagnosis. If the ultrasound residual tissue still cannot be discharged on its own after repeated rechecks, the uterus can be considered to be purged. 2. Poor uterine contraction: poor uterine contraction after abortion can cause increased bright red bleeding on the fifth day after abortion. After giving misoprostol and uterotonin to promote uterine contraction, the bleeding can be reduced. 3. Infection: Pelvic inflammatory disease before abortion, poor aseptic operation of abortion and other reasons are infected after abortion, causing endometritis, pelvic inflammatory disease and so on. It causes the blood to increase bright red on the fifth day of abortion. After antibiotic anti-infection treatment is given, the bleeding decreases. If the blood is red on the fifth day of abortion, consult a doctor to find out the cause and give treatment.