U.S. doctors online nowAsk doctors free
MD
A 38-year-old member asked:

If given a skin test, will reactions from "oral allergies" be the same as a true food allergy?

3 doctor answers8 doctors weighed in
Dr. Alex Martinez
Specializes in Allergy
No: Oral allergy syndrome refers to itching after eating foods distantly related to airborne allergens. For example, people allergic to birch tree pollen get mouth itching when they eat apples. Food tests reveal "true" reactions (worrisome since they sometimes become severe). To uncover oral allergies (a more "local" reaction that doesn't become severe), you have to test for airborne allergens.
Dr. Michael P Vaughn
Allergy and Immunology 34 years experience
Keep in mind that the detection of food specific IgE by allergy skin test or RAST does not always equate with food allergy. If you can consume a food without developing allergic symptoms then you are not allergic to that food.
Nov 10, 2011
Dr. Steven Machtinger
Allergy and Immunology 44 years experience
No: If you have an itchy mouth & throat after eating apples but no other symptoms & you have a negative skin or blood test to apple & a positive test to birch your allergist will probably call it oral allergy syndrome (oas). If the test is positive for apple then we'll call it apple allergy. Usually people with apple allergy cannot eat cooked or baked apples while those with oas can.
Dr. Gloria Fong
Family Medicine 40 years experience
No: My allergist colleagues usually do blood best for food allergies.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated Jan 31, 2020
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.