Allergic rhinitis is irritation and swelling in the nose. It is caused by an overreaction of the immune system. An allergen, something that should be harmless, is inhaled through the nose. The allergen trigger mast cells to release histamine. This leads to swelling of blood vessels and tissue that lines the nose and sinuses. This starts a chain of events that cause:
Allergy shots. American College of Allergy, Asthma & Immunology website. Available at: https://www.aaaai.org/conditions-and-treatments/library/allergy-library/allergy-shots-(immunotherapy). Accessed February 14, 2020.
Allergic rhinitis treatment. Asthma and Allergy Foundation of America website. Available at: https://www.aafa.org/allergy-treatments/. Updated March 2018. Accessed February 14, 2020.
Last reviewed September 2019 by
EBSCO Medical Review Board Marcin Chwistek, MD
Last Updated: 2/14/2020
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