My newest obsession is that I think I have mouth cancer even though I am young and do not drink nor smoke. I get mouth ulcers a lot and they all heal but I always think there is something wrong with me. I brush my teeth regularly and I floss to. I had a big mouth ulcer on my tonsil that has almost dissapeard now. I'm thinking of calling my dentist on Monday though to have a check in since I do have a tooth that is hurting. I just hate this so damn much.