Toothache is usually caused by tooth decay, but can also be present with
an infection of the tooth and root secondary to decay. Naturally you'll
want to see your dentist right away, but to help relieve the pain until
he/she can see you, try the following.
Clove oil- an effective temporary local anesthetic and antiseptic
for toothache. Place a drop of the oil directly on the painful tooth. Do
not swollow the oil or use more than a drop. See your dentist right away.