I know with my son has something the doctors called Geographic
map ... sounds funny I know but his tongue looked like a raised
map and it was itchy and white and red, now I did find that when he ate anything with acid in it like oranges or orange juice,pineapple, strawberries ect..... this map would form on his tongue. He would tell me his tongue would be very itchy and at points painful depending on how much he ate of it.