人对温度反应的差别很大,有人对寒冷特别敏感,在冬季里,即使穿棉鞋和厚袜,双脚也是冰凉,这是自主神经功能异常的一种表现。当受到寒冷刺激时,交感神经兴奋,外周血管收缩,四肢末端血流量减少,皮肤苍白发凉,致双脚湿冷,容易生冻疮。冻疮一旦发生,较难治疗,而且可以年年反复发生,因此要针对冻疮的诱发因素,做好预防工作。重视体育锻炼,注重营养,增强体质,可以增强对寒冷的抵抗力;衣服鞋袜要宽松干燥,不可过紧,潮湿后要及时更换;在寒冷环境中停留时要经常活动四肢,不要长时间静止不动;对皮肤暴露部位,如手、脸等处可用凡士林等涂擦,有保护作用。但肢端容易发凉是不是单纯自主神经功能紊乱,应请血管外科医生帮助判断,因为以下几种病很容易 People respond to temperature vary widely, some people are particularly sensitive to the cold, in winter, even wearing cotton shoes and thick socks, feet are cold, which is a manifestation of autonomic dysfunction. When stimulated by the cold, sympathetic excitement, peripheral vasoconstriction, reduced blood flow to the extremities, pale skin and cold, cold and wet feet, prone to frostbite. Frostbite in the event of more difficult to treat, and can occur repeatedly every year, so to frostbite induction factors, prevention work. Pay attention to physical exercise, pay attention to nutrition, enhance physical fitness, can enhance the resistance to the cold; clothes, shoes and socks should be loose and dry, not too tight, timely replacement after wet; stay in cold conditions, often activities of the limbs, not a long time stationary Immobile; exposed parts of the skin, such as hands, face, etc. can be rubbed with petroleum jelly, a protective effect. But the extremity is easy to cool is not a simple autonomic dysfunction, vascular surgeons should be asked to help judge, because the following kinds of diseases is easy