Normal values: oral sublingual temperature 37℃ (range 36.3-37.2℃), rectal temperature 37.5℃ (higher than oral temperature (0.3-0.5℃) and axillary temperature 36.5℃ (range 36.0-37.0℃).
There are differences in body temperature in the morning and evening, in all parts of the human body and between men and women. Normal body temperature has a relatively stable range, but it is not constant.
The oral temperature of normal people is 36.2℃ ~ 37.2℃, the axillary temperature is 0.2℃ ~ 0.5℃ lower than the oral temperature, and the rectal temperature is 0.2℃ ~ 0.6℃ higher than the oral temperature.
From the time point of view, the body temperature is the lowest at 2 ~ 5 am and the highest at 5 ~ 7 pm, but the temperature difference within a day should be less than 0.8℃.
In addition, women's body temperature is generally about 0.35℃ higher than that of men. Women's body temperature will also change slightly during menstruation.
When measuring the oral temperature, the thermometer must be placed under the tongue, 6 cm deep into the oral cavity, and the upper and lower lips are closed, so that the result can be correct.
Because the self-measured oral temperature is often inaccurate, axillary temperature is still used as the standard in clinic.