The longer the thermometer clips, the higher the temperature. What's going on?

If the thermometer is clamped for too long, the temperature will not be too high. If the thermometer is clamped for too long, the temperature will be higher. It is considered to be caused by fever. After fever due to various reasons, the temperature will continue to rise. It happens to be carried out at the time of temperature measurement. The longer the clamp, the higher the temperature.