After trauma, the patient is prone to wound bleeding because of the rich blood flow in the soft tissues of the skin. In this case, compression can be applied to the wound to stop the bleeding, and sterile gauze can be applied to compress the wound with force to stop the bleeding. In addition to compression, a tourniquet can also be applied to stop bleeding. If the patient has a large amount of bleeding from vascular injury of the arteries and veins, and the effect of stopping bleeding by compression is not good, a tourniquet can be applied to ligate the bleeding limb, such as arterial bleeding, to ligate the proximal limb of the wound, and such as venous bleeding, to ligate the distal limb of the wound, to stop bleeding in this way. In addition, you can also use drugs to stop bleeding, such as hemostatic aromatic acid, hemostatic minerals, hemagglutinase and other drugs, to stop bleeding.