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Flu Symptoms

Flu symptoms tend to start quickly and can include fever, chills, dry cough, and sore throat. People often confuse cold symptoms with those of the flu. However, cold symptoms are usually milder and don't last as long as flu symptoms. You can spread the flu to others before your symptoms start and for another 3 to 4 days after your symptoms appear.

 

Flu Symptoms: An Overview

It's easy to confuse a common cold with flu symptoms. However, cold symptoms are usually milder and don't last as long as the flu symptoms. If you become infected with the flu virus, you will usually feel flu symptoms 1 to 4 days later. It is important to note that you can spread the flu to others before your flu symptoms start and for another 3 to 4 days after your flu symptoms appear.
 
(Click Flu Virus for more information about the flu.)
 

Common Flu Symptoms

Common flu symptoms start quickly and can include:
 
  • Fever
  • Chills
  • Dry cough
  • Sore throat
  • Runny or stuffy nose
  • Headache
  • Muscle aches
  • Extreme fatigue.
 
Typically, the fever will begin to decline on the second or third day of the illness.
 

Flu Symptoms and the Stomach Flu

Although nausea, vomiting, and diarrhea can accompany flu symptoms, especially in children, gastrointestinal flu symptoms rarely occur. The illness that people call "stomach flu" is not influenza (the flu).
 
(Flu Symptoms Continued: Page 2)
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Written by/reviewed by: Arthur Schoenstadt, MD
Last reviewed by: Arthur Schoenstadt, MD