(Emily Henderson/ Medical Net) — Welcoming spring this year has been bittersweet for the millions of allergy sufferers already experiencing itchy eyes, nasal congestion, sneezing and runny noses.

What causes someone to be allergic to seasonal allergens and other irritants is unknown. The key to understanding allergies  …

According to Time Magazine, the reason why a summer cold may feel so much worse than the winter variety is mostly psychological.

“My view is that severity [of a summer cold] is perceived as worse than a winter cold because summer colds are not so common,” says Dr. Ronald Eccles, professor emeritus and former director of the Common Cold Centre  …