There are two possibilities for bleeding: First, a relatively large artery or vein is damaged, which needs to be sent to the hospital immediately for debridement, suturing, ligation of the large artery or vein, or re-suturing and connection using artificial blood vessels to stop the bleeding. Second, there is no major damage to the blood vessel, but there is a problem with the clotting mechanism. If this happens, the cause of the clotting disorder needs to be clarified and treated symptomatically according to the cause. In life, the bleeding caused by coagulation factors are usually hemophilia, pulmonary embolism, and also amniotic fluid embolism, characterized by frequent petechiae on the body surface and frequent bleeding when brushing teeth.