I have had an ulcer on each side of the inside of my mouth since July 2007. They started going down after they first appeared, but got to a point where they stopped and can easily increase in size if I accidentally bite them (rarely happens though) as well as occassionally making it difficult to talk when they rub my teeth.I used bonjella for weeks then went to my GP and was first advised to take vitamin tablets and a few months later folic acid tablets. I have recently been prescribed adcortyl, but alas it's not really doing much and it doesn't stay in my mouth easily either. The ulcers are long and narrow and are located just above my front lower Molar teeth. Why aren't they going away and what else can be done to get rid of them?