Bleeding after a spontaneous abortion indicates that there is residual tissue in the uterine cavity, including blood accumulation, or even continuous bleeding due to uterine contraction. In this case, we should go to the hospital to take blood test for HCG to see if the HCG value has returned to normal after spontaneous abortion, and we should also take an ultrasound examination of the abdomen to determine if there are large residual tissues and blood accumulation in the uterine cavity, and according to the situation, we can take oral medication to activate blood circulation and remove blood stasis, including anti-inflammatory drugs to avoid the tendency of infection. However, some women have more residual tissues inside the uterine cavity after spontaneous abortion, which is more than one centimeter, so it is recommended to have a painless abortion to help remove these residual tissues and avoid unnecessary effects on the body by planting them into the uterine cavity for a long time. In the future, it is important to review the ultrasound regularly to ensure that the uterine cavity is in a normal shape.