What causes recurrent low-grade fever in influenza B?

Patients with influenza B who experience recurring low-grade fever may be suffering from immune system responses, viral relapse, or other infections. Influenza B is an acute respiratory infectious disease caused by the influenza B virus, with main symptoms including fever, cough, sore throat, body aches, fatigue, headache, and loss of appetite. Patients are advised to rest adequately, stay hydrated, and take measures to control body temperature, such as using antipyretic medications. If symptoms persist or worsen, prompt medical evaluation and treatment are necessary. During treatment, patients should pay attention to diet and hygiene, avoid consuming irritating foods and beverages, and increase intake of nutrients and fluids. Recurring low-grade fever in influenza B cases warrants timely medical consultation to prevent delayed diagnosis and treatment.