Non-freezing cold injury

Frostbite generally occurs in winter and early spring in China, and is more common in the Yangtze River than in the north. Because the Yangtze River Basin is relatively humid in winter, it is relatively humid, and cold protection measures are not as good as in northern areas. Children often ignore cold protection, so people with frostbite are common. Therefore, lame and impregnated feet used to occur during wartime. The former was caused by standing in a trench at 1-10 ° C for a long time, and the latter was caused by standing in cold water. These two types of cold injuries can also occur under certain conditions such as construction, paddy field work, or military duty.