Mix an ounce or two of hydrogen peroxide with about a teaspoon of baking soda. Then gently but thoroughly brush the tooth (on it, all around it). It will clean, disinfect, reduce swelling and kill off any exposed tissue/nerves that need to go. It will dull and relieve the pain. It is the only effective thing you can do.

Sometimes not even clove oil will work as well as this does.

Trust me, I have had 15+ pain levels on the scale of 1-10. Horrendous pain.

If this does not work, you may have a very, very severe case and in cases like those, there may not be much you can except maybe slam 9 or 10 shots of rum.

It should work though. Good luck.