i have burning inside my mouth and cancor sores underneath my tongue. even chewing gum burns my mouth and i can't use toothpaste. i use peroxide to brush my teeth because i have sores that come and go on the right side of my mouth to the gums and underneath and along side my tongue on the right side. i had a dentist tell me this was more than likely a vitamin deficiency of some sort but after all this time i tend to think it is possibly an acid surplus. i have been on celebrex for joint pain, effexor for a spastic colon, and the only timing i can relate all of this to is the death of my mother at Christmas 2008. If i eat chips, my mouth gets extremely sore, if i eat sausy tomato things, my mouth gets sore, if i don't eat any of these things, my mouth and tongue still burns, and if i take zantac, it helps. i have in two years had only two times without uncers below and alongside my tongue on the right side and i have no idea why. it wouldn't be so bad except that even ice cream and bubble gum burns like wild fire ALWAYS!