The main symptoms of influenza are high fever and fatigue, and patients will also experience symptoms such as body aches and headaches. Some patients will also experience symptoms such as runny nose, sore throat, and dry cough. The course of influenza is about seven days, and the incubation period is about one to three days. Therefore, if you have flu-related symptoms, you should actively go to the hospital for examination and diagnosis, and then cooperate with your doctor for treatment.