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What causes allergy?

ANSWER

Allergy symptoms happen when your immune system overreacts to something that doesn’t bother most other people. Whatever’s causing this is called an allergen.

For instance, allergies might affect you only at certain times of year, like in the spring, when pollen abounds. Or they can flare up when you make contact with something -- like when you eat, dust, or touch a certain plant or animal. Whatever the trigger, your system thinks it needs to fight it.

From: Become an Allergy Detective WebMD Medical Reference

SOURCES:

Food Allergy Research and Education: “About Anaphylaxis,” “Symptoms.”

American College of Allergy, Asthma, and Immunology: “Allergy Symptoms,” “Anaphylaxis,” “My Nasal Allergy Journal,” “Skin Allergies: Hives.”

Asthma and Allergy Foundation of America, New England Chapter: “Allergy Basics.” 

CDC: “Latex Allergies.”

Mayo Clinic: “Food Allergy: Tests and Diagnosis.”

Allergy UK: “Food and Symptoms Diary.”

University of Michigan Health System, Department of Internal Medicine, Division of Allergy and Clinical Immunology.

American Family Physician : “Hives and Exercise -- What It Means and What to Do,” “Things That Can Cause Asthma and Allergies.”

Asthma and Allergy Foundation of America: “How Can I Contact AAFA?” “Pet Allergy: Are You Allergic to Dogs or Cats?”

Reviewed by Laura J. Martin on February 01, 2017

SOURCES:

Food Allergy Research and Education: “About Anaphylaxis,” “Symptoms.”

American College of Allergy, Asthma, and Immunology: “Allergy Symptoms,” “Anaphylaxis,” “My Nasal Allergy Journal,” “Skin Allergies: Hives.”

Asthma and Allergy Foundation of America, New England Chapter: “Allergy Basics.” 

CDC: “Latex Allergies.”

Mayo Clinic: “Food Allergy: Tests and Diagnosis.”

Allergy UK: “Food and Symptoms Diary.”

University of Michigan Health System, Department of Internal Medicine, Division of Allergy and Clinical Immunology.

American Family Physician : “Hives and Exercise -- What It Means and What to Do,” “Things That Can Cause Asthma and Allergies.”

Asthma and Allergy Foundation of America: “How Can I Contact AAFA?” “Pet Allergy: Are You Allergic to Dogs or Cats?”

Reviewed by Laura J. Martin on February 01, 2017

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