Influenza can cause recurrent fever as a symptom. Epidemic influenza, also caused by influenza or parainfluenza virus infection, is a type of acute respiratory infectious disease. The presence of the virus in the body can stimulate the body's temperature regulation center, which may cause recurrent episodes of fever, typically lasting about three to five days, and the fever should not persist beyond seven days, so there is no need for excessive worry. It is advised to drink plenty of water, rest adequately, and take appropriate antipyretic medication to manage the fever when it occurs. Additionally, antiviral medications like Qingkailing or antiviral oral solutions can be used for antiviral treatment. (Specific medications should be taken under the guidance of a physician.)