I work in a vet's office and if a client called explaining that problem we would DEFINATELY want to see them ASAP!!! After all dentistry's and extractions we tell people to feed their animal a soft diet for the next few days because their mouths may be sore. But 10 days is NOT normal. I know taking your kitty to the vet is the last thing you want to do, but it will be worth the trip! You would want the same thing done for you if you were in the cat's shoes. So please take him to the vet!!!