Allergic rhinitis is a type of allergy that affects the nose and paranasal sinuses. It is characterized by symptoms such as sneezing, congestion, runny nose, itchy nose and eyes, and post-nasal drip. These symptoms are caused by an allergic reaction to allergens such as pollen, dust mites, mold, and pet dander that trigger an immune response in the body which causes inflammation and swelling of the mucous membrane in the nose.. Allergic rhinitis can be seasonal or perennial, depending on the allergens that trigger the reaction. Treatment options include avoidance of allergens, medications such as antihistamines and nasal sprays. The latest development in allergic rhinitis is the availability of immunotherapy.
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