High fever

Fever is a common symptom of many diseases. High fever (High Fever) is clinically critically ill. Normal body temperature is usually measured by anal temperature of 36.5 ~ 37.5 ℃ and axillary temperature of 36 ~ 37 ℃. Under normal circumstances, the axillary temperature is 0.2 to 0.5 ° C lower than the mouth temperature (under the tongue), and the anal temperature is about 0.5 ° C higher than the axillary temperature. Although the anal temperature is more accurate than the axillary temperature, it is often based on the axillary temperature for various reasons. If the patient's measured axillary temperature is as high as 39.1 ~ 40 ° C for a long time, it is called high fever.