DefinitionTemperature measurement is a method to take a person's temperature and determine whether it is within a normal range. A high temperature is a fever.How the test is performedIn the past, a glass thermometer filled with Mercury was used to measure body temperature. However, the American Academy of Pediatrics (AAP) recommends against using mercury thermometers because the glass can break, and mercury is poisonous.Electronic thermometers are most commonly used and recommended. The temperature is displayed on a digital readout. Follow the directions that come with the thermometer. Electronic probe thermometers can be placed in the mouth, rectum, or armpit.Plastic strip thermometers change color to indicate the temperature. This method is the least accurate. Place the strip on the fore