Allergic rhinitis
Allergic rhinitis is a collection of symptoms, predominantly in the
nose and eyes, caused by allergens such as dust, dander, and
pollen. The sensitized immune system produces antibodies to these
allergens, which cause chemicals called histamines to be released
into the bloodstream, causing itching, swelling of affected
tissues, mucus production, hives, rashes, and other symptoms.
Symptoms vary in severity from person to person. Hay fever is a
common example of allergic rhinitis.
Review Date: 7/21/2009
Reviewed By: A.D.A.M. Editorial Team: David Zieve, MD, MHA, Greg
Juhn, MTPW, David R. Eltz. Previously reviewed by Stuart I.
Henochowicz, MD, FACP, Associate Clinical Professor of Medicine,
Division of Allergy, Immunology, and Rheumatology, Georgetown
University Medical School (5/25/2009).
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