Hypothermia is a medical condition in which the body temperature drops below the normal range of 36.5-37.5°C (97.7-99.5°F). It is caused by prolonged exposure to cold temperatures or a sudden drop in body temperature. Symptoms of hypothermia include shivering, confusion, drowsiness, and slurred speech. If left untreated, it can lead to serious health complications, including organ failure and death.