Should follow the following four principles: 1, the injury brake: after the injury, if barely sustained activities, not only will delay treatment, but also aggravate the injury. Therefore, the injured must ensure that the injury rest brake, if necessary, the upper limbs with a triangle towel fixed, lower limbs with a simple splint fixed support, these are good emergency treatment; 2, ice: post-injury swelling is mainly caused by due to microvascular rupture and tissue oozing, ice can prompt the rupture of the microvascular contraction so as to stop the bleeding, reduce the continued swelling. If the more bleeding, the longer the healing time; 3, such as traumatic active bleeding, should be pressurized bandage to stop bleeding, the family can wrap the elastic bandage on the side of the injury or use a clean towel and other items to directly press the wound by hand to stop the bleeding, towel with the outside of the ice pack to achieve the effect of hemostasis. But do not be too tight, so that the blood can not circulate completely; 4, elevate the limb: this is the use of the natural law of water flowing to the lower part of the body, will be due to the injury and the more difficult to return to the limb of the blood and body fluids drained away. Finally, go to the nearest hospital as soon as possible for treatment.