The Claim: It's a Cold. No, It's an Allergy

A stuffy head, a sore throat and sneezing fits that could leave you with a migraine: according to some surveys, about 20 percent of Americans report experiencing symptoms like these at the same time every year. That would suggest they are due to an allergy, not a cold. But how to tell the difference?

Symptoms of seasonal allergies and colds overlap, but studies suggest there are ways to tell them apart.