Go to a pharmacy & ask for canker sore stuff. Doesn't matter the brand, I was told all r basically the same stuff.

I got Rob some & he loved it!! He said it went numb & took alot of the pain out of it & was happy to snack on some food. He had stopped eating because of where it was, everytime he chewed his teeth would rub it & make it bigger & sore.

He said not to use too much, just enough to cover the sore lightly. If u use too much, parts of ur mouth will go numb too,, hehehe he said its cool, but not good, u tend to bite ur lips more heheheh (or the parts that r numb)