III and IV degrees
The formation of blisters with blood contents, there is a death of the skin and subcutaneous fat.
As a rule, such frostbite is accompanied by a general disease, a profound circulatory disorder, the affected part of the body dramatically swells, becomes dark, and gangrene can develop. Therefore, if the usual coloring of the skin does not appear, it is necessary, having put a bandage on and warmly covering the victim, to send him to a medical institution (see Chapter. Surgical diseases, frostbite).
Prevention:With a forced long stay in the cold, it is necessary to take a hot meal at least 2 times a day, warm, unrestricted clothing, well-fitting, waterproof, greased shoes. Insoles should be used, to combat sweating feet.
Going out in the cold you can grease the face, ears, lips, fat. It is a mistaken opinion that alcoholic drinks warm up the body. As alcohol expands blood vessels, on the contrary, there is an increased body heat return — the street. The best method of preventing frostbite in the gradual addiction to cold - hardening of the body.