Difference Between the Flu and a Cold
The flu and a cold are both respiratory infections. Both are caused by viruses. But the flu is not the same as a cold.
Flu symptoms
Flu symptoms are usually much worse than a cold. The flu usually comes on suddenly and lasts longer.
Symptoms may include:
- A fever.
- A cough.
- A runny or stuffy nose.
- A sore throat.
- Shaking chills.
- Body aches.
- Headaches.
- Feeling very tired.
Symptoms are usually worse for the first few days. It can take up to a few weeks to feel better. The flu usually doesn't cause vomiting or diarrhea in adults, but it can cause those symptoms in children.
The flu usually occurs during colder months like the late fall and winter.
Cold symptoms
Cold symptoms are usually milder than the flu. They usually come on over the course of a couple of days.
Symptoms may include:
- A runny nose and sneezing.
- Red eyes.
- A sore throat.
- A cough.
- Headaches.
- Body aches.
Colds usually last about a week. As the cold gets worse, your nose may get stuffy with thicker mucus.
You can catch a cold at any time of year, but they are more common in late fall through early spring.
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Current as of: March 22, 2026
Author:
WebMD Ignite Staff
Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
Current as of: March 22, 2026
Author:
WebMD Ignite Staff
Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.