Is it a cold or the flu?

Concerns & risks

You were trying to get through the week, but you woke up achy, sneezing and miserable. Now you're wondering: is this just a cold, or the flu?

Knowing helps you decide whether to rest at home or call a doctor.

Causes & evidence

Flu usually comes on suddenly with fever, aches and exhaustion; colds are milder. See cold vs. flu. If symptoms are severe, sudden or getting worse, contact a doctor or emergency services.

What to do

1. Check for fever and body aches.
2. Rest and drink fluids.
3. Call a doctor early if you're high-risk; flu antivirals work best early.
4. Stay home to avoid spreading it.

Common mistakes: Common mistakes: assuming it's 'just a cold' and pushing through work while sick, spreading it to others. Flu often comes on suddenly with fever, body aches and exhaustion, while colds are usually milder. Antiviral treatment for flu works best when started early, so people at higher risk should call a provider soon. Antibiotics don't treat viruses. Rest, fluids, hand washing and staying home help. Seek care for trouble breathing, chest pain, confusion or symptoms that improve then get worse.

Speed Man tip: Antibiotics don't treat colds or flu.

Wrap-up: Flu hits faster and harder. Rest and fluids. High-risk people should call early.

Want the why behind it? Read Fever Basics in the wiki.