I had a root canal in the #5 molar on April 6th and finished on the 13th. Since then I have had various problems including a burning tongue and the same problem with the roof of my mouth. (Also have a very dry mouth, which I never had before the root canal). Went back to the Endodontist and my family dentist. I was told to go to my family doctor, which I did today. I received no help from any of them. You can't see anything in my mouth, but it burns so bad (tongue and roof of mouth). I have been using Biotene, but it only works for a brief period of time. Sometimes when I put my tongue on the tooth that had the root canal and suck, I get a medicine taste. I am taking Simvastatin 3 times a week and a vitamin supplement, and I have been on that medication for more than a year. Please help, if you can. Thank you.