Here comes spring, a potentially uncomfortable season for an estimated 81 million people in the United States who are allergic to the onslaught of pollen from trees, grasses and weeds this time of year, according to the Asthma and Allergy Foundation of America.
Allergies result from the immune system's reaction to something that for most people is harmless -- for example, pet dander, nuts or, in the spring, pollen. Symptoms of allergic rhinitis (sometimes referred to as hay fever) may include itchy and watery eyes, nasal congestion, frequent sneezing and a sore throat.