Scalding is often caused by high temperature liquids such as boiling water, hot oil, steel, high temperature solids, or burning hot metal, high temperature steam, etc., which cause damage to human body surface tissue. In addition, there is a special type of scald called hypothermic scald, that is, the scald caused by prolonged contact with a low heat object above body temperature, which occurs mostly in winter, and the preferred site of scald is the lower extremity. The literature reports that irreversible geothermal burns can occur from contact with the skin at 44℃ for more than 6 hours, and the degree of damage from 44℃-51℃ is positively correlated with the length of contact time, while burns above 51℃ can cause damage to the soft tissue of the skin in a very short time. The common clinical causes of burns are as follows: 1, steam, boiling water, hot oil and other burns; 2, not a good protective cover that the use of hot water bags or kettles; 3, the use of glass containers and other vessels with strong thermal conductivity for the kettle; 4, connected to the power and long-term use of electric blankets; 5, hot water bags placed in the same location for a long time.