Allergist and Immunologist Questions Allergies

Is an allergy to apples possible?

My daughter is 13 years old. Yesterday she had an apple and immediately after eating the fruit she devoloped severe rashes on her tongue. I gave her Zyrtec post that helped the reaction subside. She had no such allergy like this before. Can an allergy to apples develop all of a sudden?

4 Answers

You most likely have the ”oral allergy syndrome,” which is a localized oral reaction to a protein just beneath the skin. It is related to pollen allergy - most likely birch pollen. It will not occur with cooked apples.
People do develop allergies overtime and she may have been having increasing problems with apples. It sounds like she may have oral allergy syndrome, which occurs with certain raw fruits and vegetables and causes mouth itching primarily. This can be related to outdoor allergies as the apples and tree pollen allergens cross react in some people.
Yes, one can develop an allergy to apples, though a true allergy to apples is rare. It is more likely that your daughter has developed oral allergy syndrome, especially if she suffers from "hay fever " (bitch pollen allergy seems to be the culprit).
Allergy to a food may begin at any time. Some people are allergic to one species of apple and some to all. If the reaction was only on her tongue, it may represent the oral allergy syndrome. She should have allergy testing for apple and if you know the specific apple, bring it with her to the Allergist. There are serious food allergies and milder ones. She should see an Allergist.