An axillary temperature of 37.4°C is considered a fever. There are three main parts of the body that routinely measure body temperature: the mouth, the armpit, and the anus. There are differences in the reference range of body temperature at each location, with the armpit temperature being the lowest, and the anal and oral temperatures being closer to the body temperature and relatively higher. In general, the most commonly used location for temperature measurement is the axilla, and the reference range of axillary temperature is 36℃ to 37.3℃, so a temperature over 37.3℃ is considered to have fever, and 37.4℃ is considered to be hypothermia. Some special circumstances should be excluded, such as women during pregnancy, physiological period, the body temperature may be about 0.3 ℃ rise, so pregnant women 37.4 ℃ is not necessarily a fever, it is recommended to combine other clinical symptoms to determine. If you find a prolonged axillary temperature of 37.4 ℃, accompanied by other uncomfortable symptoms, it is recommended to go to the hospital for examination and treatment.