Do your lips or mouth start tingling or itching when you eat apples, pears, plums, or other raw fruits? You’re not alone — and you might not be allergic to the fruit itself. Surprisingly, a pollen allergy is often the real cause.

This common reaction is known as Oral Allergy Syndrome (OAS), and understanding it can help you avoid unnecessary food restrictions.

What Is Oral Allergy Syndrome?

Oral Allergy Syndrome happens when your immune system mistakes proteins in raw fruits, vegetables, or nuts for similar proteins found in pollen. If you’re already allergic to pollen, your immune system has learned to react to those pollen proteins, and when it encounters a similar-looking protein in certain raw foods, it triggers the same response.

When these foods are eaten raw, this misidentification causes your allergy cells (mast cells) to release histamine and other immune mediators — leading to the itching or tingling in your mouth and throat.  

These symptoms usually appear within minutes of eating the raw food.

‍

Why Cooked Fruit Often Doesn’t Trigger Reactions

The good news is that most people with OAS can eat cooked or baked versions of the same fruits and vegetables without any problems.

That’s because heat from cooking, changes the shape of the fruit proteins, destroying the resemblance to pollen. Once the shape is altered, your immune system no longer confuses the food with pollen — so the reaction disappears.

‍

How the Alex³ Allergy Test Can Help

The Alex3 allergy test offered at Well Life Clinic provides detailed information about specific allergic sensitivities, including pollen-related cross-reactions. Understanding exactly what’s driving your symptoms helps guide appropriate management, reduce unnecessary food avoidance, and decrease anxiety around eating.  

If you experience these symptoms or are unsure about possible food or pollen allergies, a consultation and targeted allergy test can offer clarity — and a clear plan for managing your symptoms safely.  

‍

Book an allergy test with us HERE.