How long should the thermometer be kept under the tongue for oral temperature measurement?

For accurate oral temperature measurement, the thermometer should typically be kept under the tongue for a duration that ensures the reading reflects the internal body temperature. Keeping the thermometer for 3 minutes allows enough time for the device to stabilize and accurately register the temperature.

This duration helps to mitigate any fluctuations due to factors like breathing or slight movements, which might affect the readings if the thermometer is removed too soon. While some thermometers, especially digital ones, may provide quicker readings, traditional glass thermometers, often used in this context, require a longer time to ensure precision. Other durations mentioned may not provide sufficient time for the thermometer to reach an accurate reading, leading to potential underestimation or overestimation of the body's true temperature.