Before getting diagnosed with uc in sept I had back to back canker sores for 6 months. As other symptoms worsened theses stopped only weeks before I was diagnosed and began any treatment. While I Feel like I am finally in remission these have come back recently and with full force!! Does anyone else suffer with these, and is it a sign of a flare? I'm just starting to feel better and came off prednisone a few weeks ago. I have my first colonoscopy tomorrow to see how things are. Fingers crossed this isn't the start of it all over again!