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What is an allergy?

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Your immune system’s job is to protect you from bacteria and viruses. If you have allergies, though, part of your immune system works too hard. It may attack harmless substances -- like cat dander or pollen -- in your nose, lungs, eyes, and under your skin. When your body meets an allergen, it makes chemicals called IgE antibodies. They cause the release of chemicals like histamine, which cause swelling and inflammation. This creates familiar symptoms like a runny nose, itchy eyes, and sneezing as your body tries to remove the allergen.

From: Allergic Asthma WebMD Medical Reference

SOURCES: American Academy of Asthma, Allergy, and Immunology: "What to expect at the doctor's office," "How to help your allergies and asthma," "Allergic asthma information," "Is your asthma allergic?"  American Medical Association, 1998.  National Heart, Lung and Blood Institute: "Asthma: How is Asthma Diagnosed?" "How is asthma treated?" Boehringer Ingelheim: "US FDA Expands Approval of Tiotropium Respimat® for Maintenance Treatment of Asthma in Children." FDA. Prescribing Information: Spiriva Respimat.




Essential Guide to Asthma,

Reviewed by Carol DerSarkissian on August 06, 2017

SOURCES: American Academy of Asthma, Allergy, and Immunology: "What to expect at the doctor's office," "How to help your allergies and asthma," "Allergic asthma information," "Is your asthma allergic?"  American Medical Association, 1998.  National Heart, Lung and Blood Institute: "Asthma: How is Asthma Diagnosed?" "How is asthma treated?" Boehringer Ingelheim: "US FDA Expands Approval of Tiotropium Respimat® for Maintenance Treatment of Asthma in Children." FDA. Prescribing Information: Spiriva Respimat.




Essential Guide to Asthma,

Reviewed by Carol DerSarkissian on August 06, 2017

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