Flu symptoms are usually more severe than cold symptoms and tend to come on suddenly. Flu-related illness can range from mild to severe, and in some cases may require hospitalization. Here are flu symptoms to look out for:
Most common
- Fever
- Cough
- Sore throat
- Runny or stuffy nose
- Muscle and body aches
- Headaches
- Fatigue
Less common
- Vomiting
- Diarrhea
To learn more about flu symptoms, visit our health encyclopedia.