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step #1
A person eats an allergen, or substance that causes an allergic reaction for the first time. -
step #2
When the person eats the allergen, the body creates an antibody, or a protein that detects harmful substances. -
step #3
This antibody, attaches itself to cells found in tissues all over the body in order to prepare the body for if that allergen enters the body again. -
step #4
When the food allergen enters the body again, the allergen binds to the antibodies and sends out signals to the body to release large amounts of histamine. -
step #5
The histamine causes irritation and swelling in parts of the body. -
step #6
The result of this irritation varies in person to person, from mild hives, shortness of breath, to anaphylaxis.
