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Cold, Flu, & Cough Health Center

Understanding Flu Symptoms

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Symptoms of the flu include:

Call Your Doctor About the Flu If:

  • You experience any of these symptoms and your immune system is already weakened by cancer, diabetes, AIDS, or other conditions; or if you have a serious illness such as chronic heart or kidney disease, impaired breathing, cystic fibrosis, or chronic anemia; you may be at risk of developing serious secondary complications and need to be carefully monitored as long as symptoms last.
  • Your fever lasts more than three or four days, you become short of breath while resting, or you have chest pain; you may have developed pneumonia.
  • Your nasal drainage is yellow or green and has lasted for more than 10 days

WebMD Medical Reference

Reviewed by Jennifer Robinson, MD on October 24, 2014

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