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Step 1
a person eats an substance that causes an allergic reaction for the first time -
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step 2
when the person eats the substance the body creates an antibody or a protein that detects harmful substances -
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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 -
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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 -
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step 5
the histamine causes irritation and swelling in parts of the body -
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step 6
the irritation varies in person to person from mild hives, shortness of breath, to anaphylaxis