Hay fever (or allergic rhintis) is a term used to describe the many symptoms that come when the body's immune system overreacts to a foreign substance or 'allergen' like pollen. When this happens the immune system releases large quantities of a substance called histamine which leads to the itchy, stuffy nose, irritated eyes, sore throat and headache that causes summer misery for millions. Being allergic to pollen, dust or pet dander isn't something that can be cured - anyone who claims to have a 'cure' isn't being truthful. But hay fever can be managed to make life more bearable. Arming yourself with the right information, making small changes to diet and lifestyle and using healthcare products that are right for you is the best way to handle your allergies.