In the cold winter, the exposed skin does not have enough warmth, and the body''s blood circulation is not smooth, so it is easy to get frostbite. Frostbite often appears in the hands and feet, cheeks, ears, etc., which has a great impact on the patient''s normal life. So what are the symptoms of frostbite?

　　First, the extremities Coldness
The reason why frostbite appears in the body is that a large part of the reason is that the blood circulation is too poor, so many people with long frostbite will have symptoms of coldness at the end of the limbs, and some people will also Blacking occurs because of a lack of blood, and if you find these abnormalities in your body, you should be alert to frostbite.
　　Second, local swelling
　　After suffering from frostbite, it may be a very small piece at the beginning, that is, broad beans or fingernails so large, it is relatively hard The lumps are pink at the beginning, but as the condition worsens, the frostbite lumps will grow larger and larger, and the color will change from pink to bluish purple. This situation is more likely to appear in the hands and feet.

　　Three, The surface of the affected area is different.
　　After frostbite occurs, the skin of the affected area will be different. The epidermis is often stretched and tight, and it is still very shiny. You will feel cold when you touch it with your hand. If you press this area with your hand, the purple color will fade immediately, but it will soon recover.
　　Four, itchy and itchy
　　 frostbite can also cause pain and itching, which is very uncomfortable. Frostbite is caused by the environment being too cold and the blood vessels contracting rapidly. According to the principle of thermal expansion and contraction, if the temperature becomes higher, the environment will be warmer and the blood vessels will expand, so that the frostbite area will feel very itchy, and also It will be accompanied by tingling.

　　Five, Yue Nong The more itchy
　　 Most frostbite will want to scratch once itchy, but the more scratchy, the more itchy, and it will become small blisters if you accidentally, if these small blisters are If it is torn, it will leak pus, and then it will ulcerate and infect, and even bleed if it is serious.