Why don't doctors use the lab thermometer?

Doctors typically don't use lab thermometers for measuring body temperature because these thermometers are designed for different purposes and may not provide quick or safe readings on humans. Lab thermometers can take longer to register temperature changes and can be fragile or hazardous if broken. Instead, doctors prefer clinical thermometers, like digital or infrared thermometers, which are specifically designed for accurate and rapid measurements of human body temperature.