hi,doctor: in my mouth,there are some sore spots repeatedly occurred for more than three months .I used many ways to treat but use at all,such as washing liquid and clindmacin capulses,bee honey , strong tea water washing,etc. many dentists said it needs to pull out my teeth to prevent from kanker ulcers/ stomatitis .but acctually all my teeth are good enough and perfect without any symptons yet my 63 years old.could you give some concrete better guides to me.thanks a lot.