Is it possible to be allergic to potatoes and french fries?

Possible: The most common food allergies are egg, milk, wheat, soy, peanuts, trre nuts, shellfish and fish. Potato allergy would be unusual but anything is possible.

Yes: Potato allergy exists but is rare. More people have oral allergy syndrome/food pollen allergy syndrome, most often with birch pollen allergy in the spring. The allergic antiboies (ige) to birch pollen protein cross-react with similar proteins in various fruits (apple, etc.) and vegetables (carrot, tomato, potato, etc.) causing itchy lips/mouth/throat, mild swelling. See an allergist for testing.