It can be hard to tell if you or your child has a cold or seasonal allergies because they share some symptoms. Both can cause sneezing, runny nose, and congestion, but there are key differences.

Colds are caused by viruses and usually last 7-10 days. They may come with a fever, body aches, or a sore throat. Mucus from a cold often starts clear but turns yellow or green. Contrary to popular belief, the color of mucus does not indicate bacterial infection.

Seasonal allergies, on the other hand, are caused by pollen and other allergens. They last as long as you’re exposed to the trigger. Allergy symptoms include itchy eyes, sneezing, and a runny nose with clear mucus. Allergies don’t cause fever or body aches.

If symptoms come and go with the seasons or get worse outdoors, allergies are likely the cause. Seeing an allergist can help confirm the diagnosis and find the best treatment to relieve symptoms.