If the menstrual blood is bright red with blood clots when menstruation resumes one month after the abortion, clinically it is necessary to distinguish whether there is residue in the uterine cavity, which is discharged along with the menstrual blood and causes the menstrual blood to be bright red with blood clots. If necessary, ultrasound examination can be done, and clinically, blood can be drawn to check the blood HCG to give further diagnosis. If vaginal bleeding occurs a few days after the abortion, and it is bright red with blood clots, then clinically most of them are caused by incomplete abortion, it is recommended to do ultrasound examination in time, and according to the results, if there is indeed a residual case, it is necessary to give as soon as possible to clear the uterus, otherwise it will cause a large amount of bleeding, and clinically there is a possibility of causing hemorrhagic shock.