The sudden flow of fresh blood on the 5th day after abortion may be caused by overexertion, consumption of blood-activating drugs or food, uterine contraction and poor rejuvenation, incomplete abortion, etc. It is necessary to actively seek medical advice to clarify the cause and give appropriate treatment and handling. 1. Overexertion: As the patient participated in sports too early and did not rest well after the operation, it led to the opening of blood sinuses and caused fresh blood flow from the vagina. It is necessary to pay attention to rest and avoid fatigue. Oral antibiotics can be taken to prevent infection and medication can be taken to promote the recovery of the uterus. 2. Consumption of blood-activating drugs or food: Fresh bleeding may occur after eating blood-activating drugs, such as Salvia tablets, or drinking alcohol and consuming medicinal ingredients such as Agaricus and Angelica. It is recommended to take drugs according to medical advice, do not choose on your own, and avoid eating blood-activating food; 3. Uterine contraction and poor replenishment: the uterus is stimulated during the operation during abortion, or the patient is depressed after the operation, resulting in poor contraction and incomplete replenishment of the uterus, thus fresh blood will flow. You can take some drugs that stimulate the contraction of the uterus to strengthen the contraction of the uterus. 4. Incomplete abortion: There are still residual pregnancy in the uterus after abortion, and when there is stripping between the pregnancy and the uterine wall, it will cause fresh blood to flow out from the vagina, and you need to go to the hospital for ultrasound examination in time. If there are still residues in the uterine cavity, the uterus needs to be cleared as soon as possible to avoid heavy bleeding or intrauterine infection, which can be very harmful to the uterus, and in serious cases, adhesions of the uterine cavity and blockage of the fallopian tubes, which can also have an impact on future pregnancies. After abortion, it is recommended to rest in bed, strengthen nutrition, and avoid bathing and sexual intercourse for one month. In case of sudden hemorrhage after abortion, do not panic and go to the nearest hospital immediately for treatment.