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What happens during an allergic reaction?

ANSWER

It starts when you come into contact with a trigger that you inhale, swallow, or get on your skin.

In response, your body starts to make a protein called IgE, which grabs onto the allergen. Then histamine and other chemicals get released into the blood. That causes your symptoms.

SOURCES: 

Asthma and Allergy Foundation of America. 

National Institutes of Health. 

American Academy of Allergy Asthma and Immunology.

Medline Plus: "Allergic Reactions."

Reviewed by Sabrina Felson on March 21, 2018

SOURCES: 

Asthma and Allergy Foundation of America. 

National Institutes of Health. 

American Academy of Allergy Asthma and Immunology.

Medline Plus: "Allergic Reactions."

Reviewed by Sabrina Felson on March 21, 2018

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What are symptoms of an allergy?

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