The respective limb is pressed against the body to reduce the possible influence of the ambient temperature. Your body temperature can be measured in many places on your body.

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Body heat measurement. The si unit used to measure the temperature in kelvin k. Temperature can also be measured on your forehead. Temperature is the measure of heat in the body. Because body temperature is a measure of internal thermal energy the most accurate measurements involve invasive methods such as putting a temperature sensor into the esophagus or urinary tract. The most common ones are the mouth the ear the armpit and the rectum. Temperature characterizes the body as hot or cold.
The other scales used to measure the temperature are celsius or fahrenheit. Measuring the bodys surface temperature is normally conducted by medical staff in the armpit axillary measurement and in the groin. Sinocare digital oral thermometer for adults highly accurate medical basal body thermometer for fever oral armpit or rectal temperature reading for baby kid and adults 50 in bt 302 39 out of 5 stars 36. The heat regulating mechanisms of the body eventually become overwhelmed and unable to deal effectively with the heat causing the body temperature to climb uncontrollably. Thermometers show body temperature in either degrees fahrenheit f or degrees celsius c. Hyperthermia at or above about 40 c 104 f is a life threatening medical emergency that requires immediate treatment.
However this is neither favorable nor feasible so peripheral methods are used to estimate the internal body temperature.