From year to year, the flu changes, and so do its symptoms. This is another reason to get a flu shot regularly. While the symptoms can change and vary, there are some common, recurring symptoms of the flu. These symptoms can be sore throat, cough, and stuffy nose, but the common cold also has these symptoms. With the flu and only the flu, you might also have an achy and fatigued body, headaches, chills, and/or fever. It’s possible for some patients to get a fever over 100 degrees. Young patients have similar symptoms, but they can also experience diarrhea, vomiting, and/or nausea. With newborns, the flu with a fever can be very serious, so it’s necessary to get emergency care at a hospital.