The thought of spring time can cause panic in those who suffer from hay fever because it means the nose and eyes are in for a battle.  What Is Hay Fever? Hay fever is the name most people use to refer to the symptoms caused by allergic rhinitis, the most common allergy. It is a mediated allergy that has nothing to do with hay or a fever. The inflammation of the mucus membranes that line the inside of the nose, is known as rhinitis. It is characterized by an immune-system reaction to airborne allergens. Allergic rhinitis is classified into two categories – seasonal and perennial. Seasonal allergic rhinitis is usually…