An incomplete abortion will result in vaginal bleeding, which may be increasing, decreasing, or gradually decreasing and then increasing, with variations in presentation. An abortion is a method of removing embryonic tissue and metamorphosed endometrium by entering the uterine cavity with surgical instruments. Normally, vaginal bleeding gradually decreases to disappear about one week after the procedure and usually recovers within two weeks. However, if the abortion is not clean and there is uterine residue, vaginal bleeding will occur after the operation. Specifically manifested as vaginal bleeding, dribbling, may be reduced in the postoperative bleeding, and then increased, there may be an increase in vaginal bleeding, the amount of like menstruation, or vaginal bleeding has always been more, the specific performance varies from person to person, but can indicate that the abortion is not clean. In addition, the abortion will also appear discharge odor, lower abdominal pain and other symptoms. In order to avoid infection, the patient should have an ultrasound examination in time to clarify the situation of the uterine cavity, and solve the residual tissue through medication or purging.