Sometimes it's tough to tell if you have the flu, a common cold or just allergies.

All of these ailments can cause a stuffy or runny nose, a sore throat, a headache and cough, so you might have to focus on other factors to self-diagnose.

If you are feeling the effects of allergies, you typically won't have a fever or much fatigue or body aches. And your symptoms likely come back every year in January or in the spring.

If you have a cold, you might have a mild fever and some body aches. You might feel week and even have some ear congestion. Colds generally last about a week.

Colds can happen at any time of the year, and, of course, over-the-counter medication can be used to treat symptoms.

If you have the flu, you may have a fever above 100 degrees, mild to severe body aches and a severe headache.

Over-the-counter medications are available to help with flu symptoms and antiviral medications can be prescribed to make the illness milder and prevent complications.

HealthCentral says patients should see a doctor if their symptoms become severe, if a cough lasts more than 10 days or if they have a prolonged, high fever.

This video includes images from Getty Images, Just Ard / CC BY NC ND 2.0Claus Rebler / CC BY SA 2.0.

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The city of Brookhaven's mayor and City Council last week decided to remove the colored panes of glass from the dome of Brookhaven's new City Centre after residents objected to the brightness of the colors, seen here Friday, June 27, 2025. (Reed Williams/AJC)

Credit: Reed Williams/AJC