According to the latest meteorological news, under the influence of strong cold air, Hubei will encounter a wide range of low temperature, rain, snow and freezing weather from February 1 to 6. Under the influence of cold air, the maximum temperature in the province will gradually drop below freezing, and the minimum temperature in most areas on the 3rd will only be -6 -2.
On the way to the Spring Festival, professionals remind: the weather is too cold, stay outdoors for a long time to pay attention to cold and keep warm, beware of frostbite.
What is Frostbite?
Frostbite is a local or systemic injury to the human body caused by a cold and damp external environment. If the human body is exposed to cold for a long time, it will cause systemic hypothermia, when the core temperature of the human body is lower than 34, there will be freezing, and the consciousness of the person will be blurred, and finally the cardiorespiratory arrest.
Nowadays, the extreme situation of freezing to death is rare, but in the continuous low temperature weather, people are prone to local frostbite when they are outdoors or working, especially in the parts of the distal limbs with poor blood circulation, such as fingers, toes, ears and other parts.
In general, frostbite is divided into four "degrees":
First-degree frostbite: that is, the common "frostbite", *superficial frostbite, injury to the surface layer**, redness, swelling and congestion of the frozen area**, feeling hot, itchy and burning, can heal itself within a few days. Second-degree frostbite: it will hurt the superficial dermis, **red and swollen, there will be blisters of different sizes, the blisters can be bloody fluid, and the deep part can be edema, severe pain, **dullness. Third-degree frostbite: Frostbite that occurs under the skin, changing in color from pale to black-brown or purple-brown. The injury does not heal easily, and in addition to scarring, it can also cause long-term hypersensitivity or pain. Fourth-degree frostbite: It is generally a relatively severe frostbite, which may freeze the muscles and bones, and even cause limb necrosis, and may also be generalized frostbite, which may cause sudden cardiac arrest and sudden death. What to do after frostbite?
* experts remind that the necrosis of the ** tissue caused by frostbite will be secondary to bacterial infection if not treated in time, endangering other organs and tissues and even life.
The mechanism of frostbite is similar to that of burns, both of which are caused by environmental changes that cause damage to soft tissues, so when frostbite occurs, you should immediately go to the burn department for treatment and timely**.
If it cannot be taken to the hospital immediately, it should also be rewarmed as soon as possible to reduce the time for tissue freezing. Rapid and correct rewarming is the most effective way to preserve healthy tissue.
Rewarm properly to do so:
When you find that you have a tendency to frostbite, you should immediately return to a warm room, quickly remove cold and wet clothes, shoes and hats, and let the limbs rewarm naturally. After 5 to 10 minutes, get close to the heating equipment and let the temperature rise slowly; At the same time, the frozen area can also be placed in 40 degrees of constant temperature water for 20 to 30 minutes, and then dried when the frostbite** tissue is slightly reddened and soft to the touch. Depending on the frostbite, rewarming should be followed by further hospital visits**. 
How can I prevent frostbite?
When exposed to the outdoors for a long time, protect the areas prone to frostbite, change wet and cold clothes in time, and do not touch cold metal with bare hands. In addition to keeping warm, do not stand still for a long time, and should strengthen exercise to promote blood circulation. 
In addition, in winter, you can eat more foods with cold-proof effects, such as black rice, black beans, black sesame, black fungus, etc., which can nourish blood and strengthen the body and promote blood circulation; Spicy and hot foods such as ginger, pepper, beef, and mutton also have a good effect on keeping out the cold. Eat hot meals and drink hot drinks as much as possible to enhance the body's resistance to cold and resistance. 
Fire Alert:
*: Hubei Emergency Management **Fire Protection).