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  • Medical Disclaimer

  • Preface

  • Allergy 101

  • The Different Types of Allergies

    Allergies To Food

    Food Allergens

    Allergies to Environment

    Environmental Allergens

    Immunological Barrier Disorders

    Mast Cell Disorders

  • Warding off Allergic Reactions

  • Do I Have Allergies?

  • Allergy Management Checklist

  • Citations

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Different Types Of Allergies

The Different Types of Allergies

Girl in fetal position holding stomach.

Allergies To Food

Food allergies are when exposure to a food, whether through ingestion, contact, inhalation, or injection, results in an adverse reaction resulting from an immune response.

Variety of foods scattered on the floor.

Food Allergens

Virtually any food can trigger an allergic reaction, but here are nine foods that cause the most reactions.

Man covering a sneeze indoors.

Allergies to Environment

The allergic response to environmental allergens can result in varying symptoms ranging from mild discomfort to life-threatening.

Close-up of a dog holding a stick.

Environmental Allergens

The environment around you is full of foreign substances. In people with environmental allergies, exposure to these substances triggers an immune response, which can result in allergy symptoms and cause discomfort.

Close-up of a broken fence.

Immunological Barrier Disorders

Your body has barriers in place to screen everything that enters the body. Healthy barriers are noninflamed and functional; so when there is inflammation and dysfunction of these barriers, that is what we call an immunological barrier disorder.

Close-up of a water balloon that has just been popped.

Mast Cell Disorders

Activation of mast cells that results in symptoms is a mast cell disorder called mast cell activation syndrome (MCAS).

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