Does anyone know anything about potato allergy?

True allergy rare. True potato allergy unusual and would have typical multi-organ symptoms, e.g. Itchy/swollen mouth/throat, GI upset, hives, low bp. More common is oral allergy syndrome due to allergic antibodies to birch or grass pollen that cross react with potato protein and cause itchy, slightly swollen lips, mouth, throat and can be prevented by thorough cooking of the potato.