What's behind your toothache

A toothache can be caused by different factors, including an infection or nerve injury. Once a toothache develops, it's important to see your dentist.
The University of Michigan Health System lists these potential reasons for a toothache:
An infection in the tooth or gum.
A cracked or fractured tooth.
A problem with or damage to a dental filling.
Grinding your teeth.
An injury to the tooth.
Receding gums.
A cavity.
A loose dental crown.
(Source: HealthDay News)