I have small red lines on one side of my mouth *roof* near my molar teeth. It looks kind of like veins. Awhile back I had some jaw breakers and I believe I chipped a tooth, but it wasn't too bad. By awhile back I mean like 3 months. My teeth are a little sensitive on that side, and I'm going to the dentist tomorrow. I can't really find anything already written, but I would like to know what it may be. My teeth don't seem to have cavities, though yesterday I accidentally scratched my gums trying to get something out of my front teeth. It's on the same side, though not far back and on the opposite side of the 'red veins'. Is it normal? If not, what could it be? My family has no oral cancer in it, and both sides have relatively decent teeth. My mother has awesome teeth (and hers and so on) whereas my dads teeth are kind of brittle now that he is getting older and cavity prone. Let me think... yes, I do try to brush my teeth but I'm going going to lie and say "Every single day--- TWICE A DAY!" I normally brush them once and mouthwash. I understand this is not the way to go. Trust me, I understand whatever may be wrong with my mouth is my responsibility. Thank you and I hope to hear from you soon.