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Cold, Flu, & Cough Health Center

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Understanding Flu Symptoms

Symptoms of the flu include:

  • Fever. Usually between 101° F and 102° F, but occasionally as high as 106° F, sometimes alternating with chills
  • Sore throat
  • Dry, hacking cough
  • Aching muscles
  • General fatigue and weakness
  • Nasal congestion, sneezing
  • Headache

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 Sujana Movva, MD on October 27, 2012

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