冻疮是由于天气寒冷引起局部血液循环障碍,形成组织损伤而造成的。冻疮有如下几个特点;一、多发生在肢端,尤其是关节突出部位,如手指、手背、足跟、足趾、耳朵等处。二、局部充血、肿胀、色鲜红到暗红,局部温度较低,并可发生水疱及溃疡。三、有发胀及痒的感觉,尤其在遇到温暖时,破溃后则痛。那么如何预防呢?一、经常注意保温及干燥,鞋袜不宜太紧,多 Frostbite is due to cold weather caused by partial blood circulation disorders, the formation of tissue damage caused. Frostbite has the following characteristics: First, occurred in the extremities, especially prominent parts of the joints, such as fingers, back of the hand, heel, toes, ears and so on. Second, local congestion, swelling, bright red to dark red, the local temperature is lower, and may occur blisters and ulcers. Third, there is the feeling of bloating and itching, especially in the face of warm, after the collapse of the pain. So how to prevent it? First, keep warm and dry, shoes and socks should not be too tight, and more