After the drug abortion, if there is a small amount of menstrual flow, usually need to consider the uterine cavity adhesion or cervical adhesion. Because abortion can cause damage to the uterine lining, when there is damage to the lining, it will lead to inflammation and adhesions, and the menstrual blood can not flow out normally, thus causing a decrease in menstrual flow. It is recommended that an ultrasound be done first to see if there is any fluid accumulation in the uterine cavity. For patients who are suspected of having uterine adhesions, it is recommended to do a hysteroscopy, which can not only find out whether there are adhesions, but also do adhesion disintegration surgery in the middle of the examination process. In addition, for patients who are determined to have uterine adhesions, in addition to adhesion separation, but also appropriate use of drugs to repair the endometrium.