The Great Cold is the last of the twenty-four solar terms, and is called "Great Cold" when the Sun reaches 300° Ecliptic longitude on January 20-21 of the Gregorian calendar. Big cold, like small cold, is also a solar term that indicates the degree of coldness of the weather, and big cold is the meaning of cold weather to the extreme. The great cold comes at the end of the year, winter goes to spring, and once the great cold passes, a new cycle begins.
Frostbite is a common disease in winter, the temperature plummets, the hands, feet, pinna and other peripheral parts of the human blood circulation due to poor venous return, easy to cause frostbite. Frostbite occurs mainly during the cold winter season and is caused by long-term exposure to cold, humid environments and poor blood circulation at the ends of the skin.
Once frostbite occurs, it is often difficult to cure during the cold season. Prevention of frostbite can start from the following aspects:
Pay attention to keep warm, especially the warmth of the area where frostbite is common, cold is the main cause of frostbite. At the same time, the relative humidity in the environment is reduced as much as possible, and the local environment is kept dry.
Insisting on physical exercise can improve blood circulation around the body, improve cold resistance and the immune function of the whole body.
Insisting on washing your hands with cold water, washing your face, or taking cold water baths, winter swimming, etc., can significantly speed up blood circulation and improve cold resistance.
Shoes and socks should not be too tight Shoes and socks are too tight, which will make the blood circulation of the feet worse, so it is not advisable to prevent frostbite through tight shoes and socks. Wear a wide, comfortable, sweat-perspiring insoles to stay dry and avoid local pressure.
If you spend too much time in a cold environment, such as cycling out, immediately after returning home, soak the heavily frozen and locally stressed parts with warm water, or use rubbing massage to strengthen local friction and movement to quickly improve local blood circulation.
Active treatment of related diseases: poor blood circulation in the distal limbs, sweating of hands and feet, malnutrition, anemia, etc., can cause or induce frostbite. People with a history of frostbite can treat their illness or take drugs that alter the distal terminal circulation early before the beginning of winter each year.
Source: Xuanwu Puwai