Does anyone have any experience with potato allergy? how can i fix potatoes to avoid it?

Depends on reaction: If you have a systemic reaction involving multiple symptoms (itchy mouth, GI symptoms, itchy skin, wheeze, etc) then you probably have a true allergy and must avoid all potato. If all you get is itchy mouth (and you have spring hayfever) then you may have oral allergy syndrome, where allergic antibody to birch pollen cross-reacts with potato, so may be able to eat well cooked potato. Consult md.