Recurrent viral fever is mainly due to the fact that the virus is not cleared from the body. There are many types of viruses, such as cytomegalovirus, EB-cell virus, herpes virus, etc., which may cause the body’s immune system to react, thus causing fever symptoms. However, viruses are generally self-limiting, and as the immune system responds, the virus is gradually eliminated, and the fever will gradually subside. If a virus causes a fever that does not go away, most of the time it is because the virus is still present in the body. If necessary, oral antiviral medications such as ribavirin and acyclovir can be taken under the direction of a doctor; in the case of influenza virus infections, the most commonly used medication is oseltamivir phosphate. Viral fever recurrently does not go down, should be timely to the hospital, with the doctor to check and treat, the patient should not self-medication.