In clinical practice, we often use the body temperature for axillary temperature, that is, the thermometer is placed in the armpit to measure, the normal body temperature at this time is between 36℃-37℃, more than 37℃ is considered fever, and 37.6℃ is in the state of hypothermia, hypothermia is also the body temperature between 37℃-38℃. In this case, first of all, we must drink more water, and in addition, we must clarify the cause of fever and observe whether there are some clinical symptoms, such as cough, coughing, sore throat or abdominal pain, diarrhea, frequent urination and urgent urination. According to the clinical symptoms, choose the appropriate tests to clarify the site of infection, and if necessary, give symptomatic antibiotics or antiviral drugs according to the laboratory results. It is important to measure the body temperature regularly and observe the change of temperature during the treatment.