Flu symptoms

Sudden fever, body aches, chills, and cough usually point to influenza. Antivirals (Tamiflu) work best within 48 hours — a provider can evaluate and prescribe online today.

Also called: influenza symptoms · do I have the flu · flu vs cold

Medically reviewed by Dr. Ikechukwu Ogbu, MD
MD · Board-Certified, Internal Medicine · Last reviewed

Get care for influenza online

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Flu treatment
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Seek urgent care or the ER if you have:

  • Symptoms that are sudden, severe, or rapidly worsening
  • High fever (over 103°F / 39.4°C) that doesn't respond to treatment
  • Chest pain, trouble breathing, fainting, or confusion
  • Signs of dehydration — dizziness, dark urine, unable to keep fluids down
  • Symptoms in someone who is pregnant, immunocompromised, or over 65

What flu symptoms could be

The most common causes a clinician considers. This isn't a diagnosis — it's the differential a provider works through with you.

Influenza

Influenza is one of the more common causes of flu symptoms. Ondoc can evaluate it online.

Upper respiratory infection

Upper respiratory infection is one of the more common causes of flu symptoms. Ondoc can evaluate it online.

COVID-19

COVID-19 is one of the more common causes of flu symptoms. Ondoc can evaluate it online.

Dr. Ikechukwu Ogbu, MD — Medical Director
Dr. Ikechukwu Ogbu, MD

Board-Certified · Internal Medicine · Medical Director

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