Everything you need to know about hay fever Hay fever, or allergic rhinitis, is a common condition with symptoms similar to those of a cold. There may be sneezing, congestion, runny nose, and sinus pressure. It is caused by an allergic response to airborne substances, such as pollen. The time of year it happens depends on what substance, or allergen, the person reacts to. Despite its name, hay fever does not mean that the person is allergic to hay and has a fever . Hay is hardly ever an allergen, and fever is not a symptom. Allergic rhinitis is the fifth most common disease in the United States (U.S.). This article is about hay fever, or allergic rhinitis. You can read about non-allergic rhinitis here . Fast facts on hay fever Here are some key points about hay fever. More detail is in the main article. Allergic rhinitis, often called hay fever, can cause sneezing, a stuffy or runny nose, watery eyes, and itching of the nose, eyes...
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