The normal body temperature of an average person is between 36.5 and 37.3°C, which is the axillary temperature at this time. If a patient has an axillary temperature higher than 37.3°C, it is clinically considered to be fever. Patients with fever need to seek active medical attention and improve the blood routine, C-reactive protein, calcitoninogen, chest X-ray and other related tests. If the patient is suggestive of viral infection, antipyretic or antiviral drugs, such as Qingkai Ling and Pu Di Lan, can be used. If the patient is infected with atypical pathogenic bacteria, azithromycin, erythromycin or levofloxacin can be used for treatment. If the patient has a bacterial infection, treatment with relevant antibiotics such as amoxicillin and cefaclor is required. The treatment varies between pathogenic bacteria and diseases.