Sharp instruments such as knives, scissors, etc., when misused or used too hastily, can lead to minor or serious injuries, causing blood to flow out of wounds on the surface of the body, resulting in external bleeding. When an object strikes or squeezes the body so that the deep tissues and internal organs of the body are injured, blood flows into the tissues or body cavities, resulting in internal bleeding. If the wound is injured, it is arterial hemorrhage if the blood comes out in the form of jet-like pulsation, and venous hemorrhage if the wound continues to overflow dark red blood outward. 1.Pressure bandage to stop bleeding: use sterilized gauze or clean towel, cloth folded into a pad slightly larger than the wound, cover the wound, and then tighten with a bandage or cloth bandage. However, this method should not be used when there are suspected fractures or foreign objects in the wound. 2, acupressure hemostasis: according to the direction of the artery, in the bleeding wound proximal to the end of the heart, with the finger pressure on the artery, can be temporary hemostasis, mostly used for the head, neck, limbs arterial bleeding. 3, tourniquet hemostasis: use rubber or cloth to tighten the wound above the muscle parts, the tightness to feel the distal arterial pulsation, wound hemostasis is appropriate, too loose without hemostasis, too tight will affect the blood circulation, damage to the nerves, resulting in necrosis of the limb. To mark the time of tourniquet in the obvious hand position, more than two hours, every hour to relax l 3 minutes, changed to acupressure hemostasis. This method is applicable to the large arterial hemorrhage of the limbs that can not be hemostatized by pressure.