Thanks for using health Care Magic. Read your query. The white patches described suggests a geographic tongue which is because of depappillation if the tongue. It may sometimes cause tongue discomfort and sensitivity to certain foods. It can occur sometimes due to nutritional deficiency ,anemia or stress. It doesn t usually require any treatment as it reduces on it own .Avoid using hot, spicy and salty foods for a while. If still very persistent ,consult your oral surgeon to rule out erosive lichenplanus. Hope this was helpful. Thanks and regards.