Compression hemostasis is the most convenient and fastest way to stop bleeding in response to trauma and during surgery, which is to use external pressure to make the blood vessels at the bleeding place shrink or close to slow down the blood flow, and to give platelets, fibrin, red blood cells and so on to play a function to form a thrombus, so as to achieve the purpose of stopping bleeding further. It is suitable for small wounds, but in serious cases, it is not sustainable and is only a first aid measure to control bleeding temporarily. Generally depending on the location of the bleeding, such as the top of the head, face, neck, limbs, trunk, etc., you can flexibly choose acupressure, deep pressure or tourniquet binding and other ways. Pressure hemostasis is divided into two kinds, one is the direct pressure method, using sterile gauze direct wound for about ten minutes after the bandage. The other is the arterial hemostasis method, first use the index finger or ring finger to find the proximal end of the wound artery, can not use the thumb because the artery in the thumb is easy to cause miscalculation, to determine the point of compression, after the thumb or a few fingers and the palm of the hand to carry out the pressure, blocking the blood flow to achieve the purpose of hemostasis.