Which of the following is NOT a type of cold injury?

Heat exhaustion is not a type of cold injury, as it is related to excessive heat exposure rather than cold environments. It occurs when the body becomes overheated, often due to prolonged physical activity in high temperatures or inadequate fluid intake in hot weather. Symptoms can include heavy sweating, weakness, dizziness, and nausea.

In contrast, hypothermia, trench foot, and chilblains are all injuries that result from exposure to cold. Hypothermia occurs when the body loses heat faster than it can produce it, leading to dangerous drops in body temperature. Trench foot is a condition caused by prolonged exposure of the feet to cold, wet conditions, resulting in damage to the skin and underlying tissues. Chilblains are painful, itchy swellings on the skin caused by inflammation of small blood vessels due to sudden warming after exposure to cold conditions. Understanding these distinctions clarifies that heat exhaustion, while significant, relates to heat-related illness rather than cold-induced injuries.