Flu Symptom Checker
To use the Symptom Checker, choose the symptoms that you are experiencing from the list to the right. After you've checked off your selections, click on the Next button to see your results.
In some cases, you may be prompted for more information about your symptoms.
DISCLAIMER: The information presented here does not replace the advice of your healthcare team. Please talk with your healthcare team about your medical condition and treatment.
Know the F.A.C.T.S.
Flu symptoms can be mild or severe, and can come on suddenly — be sure you know your flu treatment options so you can be prepared. Symptoms generally appear 1 to 4 days after exposure to the virus.
Common flu symptoms include:
- Fever (100°F or greater)
- Muscle aches
- Runny nose (more common in children than adults)
If you have one or more of these
symptoms, it could be the flu. Don't wait for things to get worse. Your doctor can provide you with information about prescription flu medicines.
Prescription flu medicines can shorten the duration of the flu if taken within 48 hours of first symptoms.
If you think your child may have the flu, your doctor may be able to provide you with information about prescription flu medicines that are approved for children.
Track the Flu
See flu activity in the U.S. or your state.
Is It Flu?
You have sudden fever, aches, chills, and tiredness.
What to do?
Check your symptoms ›
Flu Fighter Coloring Book
See Our YouTube Videos!
Learn more about flu prevention on YouTube. Watch our videos >
Are You “That Guy”?
If you think you have the flu, do the right thing. Watch the video ›
Developed in partnership with the NFID (National Foundation for Infectious Diseases)
Tips to Stay Flu-Free
Good preventive health habits, an annual flu vaccine, and prescription flu medicines can help keep you and your family flu-free — all year long!
Learn more ›