03/16/2026
🌿 Understanding Oral Allergy Syndrome (OAS)
Have you ever noticed tingling or itching in your mouth after eating certain raw fruits, vegetables, or nuts? You might be experiencing Oral Allergy Syndrome (OAS).
OAS is a type of food allergy that often affects people who are allergic to certain pollens. Symptoms are usually mild and limited to the mouth and throat, though in rare cases, reactions can be more severe.
Common symptoms include:
Tingling or itching in the mouth or throat
Mild swelling of lips, tongue, or throat
Rarely, more serious reactions
Why it happens:
Proteins in some raw foods are similar to pollen proteins, which can trigger your immune system. Cooking or peeling these foods typically makes them safer to eat.
Tips for managing OAS:
Avoid raw trigger foods during peak pollen season
Try cooking or peeling fruits and vegetables
Discuss any reactions with your allergist for personalized guidance
💡 Did you know? People with birch, ragweed, or grass pollen allergies are more likely to experience OAS.
Understanding OAS can help you enjoy your favorite foods safely — and know when to reach out for support.