I have been told, a few years ago, by a physician that I have a hematoma in my mouth. I can actually feel the "bump" when I rub my tongue across it. I can feel it with y finger as well. There is not pain, but I am worried about it because it has been ther for so long. I have other oral issues. I have not been able to afford all that needs to be done, so I ahev procrastinated to begin all the necessary work. What could this "bump" mean? I can seeit and it looks like a regular pimple because it has a white top...please advise. Thank you.