Ice is applied to all parts of the body and the whole body to stop bleeding, pain, anti-inflammatory and antipyretic purposes. The following points need to be noted when applying ice: 1. The maximum time of ice should not exceed 30 minutes, rest for 60 minutes before use to give local tissue recovery time. 2. need to pay attention to observe local skin changes, check the local skin color once every 10 minutes to ensure that the patient has no local skin purple, numbness and frostbite. 3. check the ice melting during use, replace and add in time. 4. physical Cooling should be measured and recorded after 30 minutes of ice application.