I have a white spot in the back of mouth (throat). It is behing the Uvula and to the side. It is like a little spot but has redness going down from it. These are not on the tonsils, I don't want to google and am doing so well hence the reason for messaging. I also have one white (what I presume is a tonsil stone there) for months but am not too worried. Can a spot at the back of the mouth...be just that? It does not look like a canker sore.