Fever indicates an attack by pathogens in the body, which may include bacteria, viruses, fungi, rickettsia, etc. An inflammatory response occurs in the body and the body sends out an immune response and will sweat spontaneously to lower the body temperature. To test the body temperature, if the body temperature is below about 38℃, it can take away more heat from the body and further be able to reduce the fever, which can achieve normal body temperature and reduce the patient’s uncomfortable symptoms. It is recommended to review the blood test to clarify the cause, closely monitor the temperature change, and carry out etiological treatment as well as symptomatic treatment.