Generally speaking, it is suggested to measure the underarm temperature in 5 ~ 10 minutes, which is determined according to the working principle of mercury thermometer and the time required for the human body to reach thermal balance with the thermometer. Mercury thermometer reflects the change of body temperature by expanding with heat and contracting with cold, and it takes some time to reach thermal balance with human body temperature. If the time is too short, mercury may not fully adapt to the body temperature, resulting in inaccurate results.
When measuring, make sure that the armpit is dry and airtight, and place the thermometer correctly. Therefore, in order to obtain accurate temperature data, please follow the correct method and ensure enough measurement time. This is not only the basic requirement of personal health management, but also the prevention of diseases and the timely discovery of abnormal situations.