Oral Allergy Syndrome (OAS) / Pollen-Food Syndrome [OAS,PFAS]

Also known as Pollen-Food Allergy Syndrome (PFAS). A type of contact allergic reaction that occurs when raw fruits, vegetables, or tree nuts cause itching or tingling in the mouth, lips, tongue, or throat. Caused by cross-reactivity between pollen proteins and food proteins. Symptoms are usually mild and often resolved by cooking the food.