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    Food Allergies - What Happens

    The first time you eat a food that triggers an allergic reaction, your body's immune system recognizes the food as a foreign substance (allergen). Your body reacts by developing antibodies against the food. When you eat the offending food again, the antibodies attack the allergen, releasing histamine and other chemicals that cause the symptoms of an allergic reaction.

    To learn more, see the Symptoms and Treatment Overview sections of this topic.

    Recommended Related to Allergies

    Managing Allergies at School

    Does your child miss school due to allergies? If so, you're not alone. Seasonal allergies are believed to affect as many as 40% of U.S. children. On any given day, about 10,000 of those children miss school because of their allergies. That's a total of more than 2 million lost school days every year. Even if your child doesn't miss school, allergies can get in the way of a productive school day, so managing allergies at school is an important part of caring for your child's health.

    Read the Managing Allergies at School article > >

    WebMD Medical Reference from Healthwise

    Last Updated: March 12, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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