I don't think it's anything to be concerned about unless he seems lethargic and completely uninterested in food. Obviously it's going to hurt to try to eat. Sucking on a bottle will probably make him hurt more depending where his most sensitive spots are. A sippy cup is usually the best way to give him a drink.
Give him plenty of fluids and keep him well-hydrated with either Pedialyte or Gatorade. You can give him the recommended doses of infant Tylenol and lots of cold wet wash clothes to chew on.
If you can obtain it, natural calcium drops for kids will help him a lot. (Dr. Christopher has one that you can probably get at your health food store.)