What happens to the tissue in the body during deep frostbite?

During deep frostbite, the body's tissues can freeze due to exposure to extremely low temperatures. This freezing primarily affects the deeper layers of skin and underlying tissues, resulting in frozen deep tissues. The process begins when ice crystals form inside the cells, leading to cell damage and blood vessel constriction, which impairs circulation. As the condition progresses, the tissue can become necrotic or die, as the cellular structures are compromised beyond repair. This understanding underscores the critical nature of frostbite as a severe cold-related injury, where immediate medical intervention is often required to prevent permanent damage or loss of functionality in the affected areas.