Scientists at the University of Colorado School of Medicine have shed light on one of the most common of ailments – the runny nose.
Your respiratory tract is under constant attack and the nose is the first line of defense. Often, especially as the weather warms, the assault comes from allergens, which cause the body to fight off a perceived threat. Infections, too, are a problem.
But millions of people get a runny nose and have difficulty breathing without an allergic attack or infection. What many people call the sniffles, scientists refer to as "non-allergic rhinitis."