冻伤是机体局部遭受低温侵袭引起的组织损伤。机体在寒冷的环境中,局部热量散失增多,当局部温度降至组织冰点以下时,即可发生冻伤。冻伤的发生,一方面与风速、潮湿、接触寒冷物件与防护措施是否恰当等外界因素有关;另一方面,它还与机体的抗寒能力、正确的适应方法、人体的营养状况等内在因素有重要关联。冻伤分四度,多发生于机体的末梢部位和暴露部位,如手、足、鼻尖、耳廓和面颊等处。每到冬季老疮处更容易复发。 Frostbite is a local tissue damage caused by low temperature invasion. Body in a cold environment, the local heat loss increased, when the local temperature dropped below freezing point, you can occur frostbite. Frostbite, on the one hand with the wind speed, humidity, contact with cold objects and protective measures are appropriate and other external factors; on the other hand, it is also with the body’s ability to adapt to the cold, the right way to adapt to the body’s nutritional status and other internal factors Important relationship. Frostbite points four degrees, occurred in the body parts and exposed parts, such as hands, feet, nose, auricle and cheeks and other places. Old winter sores are more likely to relapse.