Body temperature is a vital sign indicating the body's heat level, with normal temperature approximately 37°C (98.6°F) though individual variation exists. Temperature measurement helps identify fever (elevated temperature indicating infection or illness) or hypothermia (dangerously low temperature). Healthcare providers measure temperature using oral, ear, forehead, or rectal thermometers depending on patient and situation. Temperature above 38°C typically indicates fever warranting attention. Fever is a symptom of many conditions and often prompts people to seek medical care. Understanding normal temperature ranges and proper measurement techniques helps families assess illness severity. School and workplace health protocols often include temperature screening, particularly during disease outbreaks.