A medical thermometer is a device used to measure body temperature, helping to identify fever or other health conditions. There are various types, including digital, infrared, and mercury thermometers. Digital thermometers provide quick readings and are commonly used in homes and clinics. Infrared thermometers measure temperature from a distance, often used for quick assessments in public places. Mercury thermometers, once popular, are now less common due to safety concerns. Accurate temperature readings are essential for diagnosing illnesses and monitoring health, making medical thermometers an important tool in healthcare.