Medically reviewed by John Carew, MD Fact checked by Nick Blackmer Allergies and sinus infections have overlapping symptoms, but are caused by different things. Allergies happen when your immune ...

Whether it's allergies or sickness, your white blood cells and certain molecules are being called up for service. Here's how to tell what the heck is going on in your body: Look for patterns Year ...

Those symptoms are typically the same whether you are in the throes of seasonal allergies or a battle ... help unless you can’t kick a chest or sinus infection.