There is no other symptom is fever, it is recommended to consult a doctor in time, clarify the cause of fever and follow the doctor’s instructions for treatment. Fever is one of the clinical manifestations of many diseases, the most common are infectious diseases, such as viral and bacterial infections; followed by hematologic diseases, rheumatic diseases and so on. Fever without other symptoms is mostly due to viral infections. It is recommended to consult a doctor, and if it is clear that it is a viral infection, you can take antiviral medications, such as Abidol, Oseltamivir and other medications as prescribed by the doctor. Generally, the body temperature can be normalized in 3~5 days. However, some febrile illnesses are difficult to diagnose and treatment is also difficult, it is recommended to consult a doctor in time, improve the blood routine, C-reactive protein, calcitoninogen, lung CT and other tests, to clarify the cause of fever and then targeted treatment.