Influenza, commonly known as the flu, is a viral infection caused by a variety of influenza viruses. Symptoms of influenza can range from mild to severe and can include fever, chills, runny nose, sore throat, muscle aches, headaches, and fatigue. The most common symptom of influenza is a fever, which is usually higher than 100 degrees Fahrenheit and can last for up to five days. Other symptoms include chills, body aches, a dry cough, fatigue, and a headache that can be intense and located behind the eyes.
In addition to these common symptoms, some people may experience a runny or stuffy nose, sore throat, and a general feeling of discomfort. People who are affected by a more serious case of influenza may also experience vomiting, diarrhea, and abdominal pain.
If you suspect you have the flu, it is important to seek medical care right away as the symptoms can worsen and lead to serious complications. These complications can include pneumonia, sinus infection, ear infection, and dehydration. It is also important to get a flu shot to help prevent the spread of the virus.