I have had a canker sore on the inside of my cheek near my cuspids on the left side of my mouth. It's nearly the size of a dime and it has been in my mouth for about 10 days now. I want to know what I can do to make this damn thing go away. I have been brushing my teeth and flossing about 3-4 times a day now, I rinse out my mouth with warm salt water once a day, and I haven't been using mouthwash, in fear of immense pain. Anyone else have some decent techniques/recipes on how to make these go away.