CHOC Children's
ALLERGY AND ASTHMA :: Allergy

Diagnostic Procedures for Allergy

Diagnostic tests for allergy may include any/all of the following:

  • skin tests
    The skin test is a very accurate test that measures your child's level of IgE antibodies in response to certain allergens or triggers. Using small amounts of solution that contain different allergens, your child's physician will either inject under the skin or apply the allergens with a small scratch. A reaction would appear as a small red area. A reaction to the skin test does not always mean your child is allergic to the allergen that caused the reaction. This will be determined by your child's physician.

    Skin testing is usually not performed on children who have had a severe life-threatening reaction to an allergen or have severe dry skin (eczema).
  • blood tests
    Blood tests for allergies measure IgE antibodies to specific allergens in the blood. The blood test most commonly used is called RAST (radioallergosorbent test). Blood tests may be used when skin tests cannot by performed. As with skin testing, it is important to remember that a positive blood test does not always mean your child is allergic to that allergen.

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Online Resources of Allergy, Asthma, & Immunology

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It is important to remember the health information found on this website is for reference only not intended to replace the advice and guidance of your healthcare provider. Always seek the advice of your physician with any questions you may have regarding a medical condition. If you think you may have a medical emergency, call your physician or 911 immediately.

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