Allergic rhinitisAllergic 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, triggering the release of a chemical called histamine, which causes 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.
Harvey Simon, MD, Editor-in-Chief, Associate Professor of Medicine, Harvard Medical School; Senior Physician, Massachusetts General Hospital.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997-
A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.