NASHVILLE, Tenn. (WSMV) - It may seem like everyone is getting sick, but it could be allergies, depending on the pollen level. Pollen levels, according to pollen.com, are the measurement of the pollen ...

Did you know that a single ragweed plant can produce one billion grains of pollen in a season? Or that most pollen that causes allergy problems is so small that it is invisible to the human eye?

Allergy season can bring misery to tens of millions of Americans each year. Tree, grass, and other pollens can cause runny noses, itchy eyes, coughing and sneezing. Recommended Videos Where you live ...