What is the correct procedure for taking an oral temperature?

Taking an oral temperature requires placing the thermometer under the tongue, which is the most accurate way to measure the body's core temperature. This method allows for proper contact with the tissue in the sublingual area, which is rich in blood vessels, thereby providing a reliable reading.

The placement of the thermometer under the tongue helps maintain the thermometer's stability, which is essential to get an accurate reading after waiting the appropriate time for the thermometer to register the temperature. This method is preferred over others that may not provide a precise measurement, such as placing the thermometer on the cheek, which might be influenced by external temperature or saliva. Additionally, using the armpit or the ear does not reflect the true core body temperature as accurately as an oral measurement does.