If a spontaneous abortion is not clean, the first thing to do is to do an ultrasound to see the size of the remaining embryonic tissue. If the embryonic tissue is less than 20mm in diameter, you can take drugs to activate blood circulation and remove blood stasis to allow it to be discharged, commonly used clinically are motherwort or five plus biochemical capsules. Take the medicine usually for about a week, and then you have to go to the hospital for another ultrasound review to see how effective the medicine is. When you take the medicine, you should pay attention to as much activity as possible, which is conducive to the discharge of tissue, and do not eat cold and spicy things at the same time as taking the medicine. If the tissue is more, the ultrasound shows more than 20mm, then this situation may not have much effect on the medication, it is best to do the operation to clean the uterus, the operation can be done at once clean.