Crush syndrome often occurs in severe extrusion, smashing or bandage is too tight and fracture jamming damage to blood vessels, so that the tissue gap hematoma, muscle tissue ischemia, capillary permeability increases, inter-tissue exudate increases, the limb appears highly swollen, the pressure increases, resulting in ischemia and hypoxia, so that the muscle neural degeneration necrosis, resulting in limb contracture, dysfunction or even necrosis and amputation. Extrusion syndrome is often seen in the hands and feet by blunt objects such as bricks, stones, doors and windows, machines or vehicles and other violent extrusion due to extrusion injuries. 1, as soon as possible to lift the factors of extrusion. 2, the hands and toes of the extrusion injury, finger (toe) under the nail hematoma is black, can immediately use cold water cold compresses, reduce bleeding and reduce pain. 3.Suspect that there has been internal organ injury, should closely observe whether there is a precursor of shock, and call the ambulance emergency. 4.Crush syndrome is gradually formed after the limb is buried, so it should be closely observed and sent to the hospital in time, do not ignore the severity because there is no wound at the time of injury. 5, in the transfer process, should reduce limb activities, regardless of whether there is no fracture should be fixed with a splint, and let the limb exposed to the circulation of air, do not massage and hot compresses.