An allergy is an abnormally high sensitivity and reaction to an ordinarily harmless substance. The immune system of an allergic person reacts when an allergen is absorbed into their body, which treats the substance as a harmful invader. When this occurs it causes the body to release histamine, which can cause allergy symptoms -- watery eyes, itching, sneezing or a runny nose – these symptoms can sometimes be severe and affect your daily life. Hay fever, or seasonal allergic rhinitis is caused by an allergy to the pollen of trees, grasses, weeds or mold spores. Seasonal allergic rhinitis may occur in the spring, summer or fall and may last until the first frost. Which allergen causes a reaction depends on the season, the region of the country and pollination periods. Symptoms of such hay fever include sneezing, runny nose and itching and watery eyes.

The Shopping Bags review some common allergy remedies called antihistamines to see which one is most successful at relieving those annoying symptoms.