This worked for me:
Put about 10 asperin on a piece of typing paper
Fold the paper over the asperin
Crush them with a hammer (like a giant bc powder)
Pour the powder on aflicted area
(If it's a top tooth, hold your head upside down when pouring the powder)
Leave on as long as you can stand it
3-6 applications and it will never hurt again
(But your tooth will darken because it kills the nerve)