There are several possible causes of this type of pain: decay, a loose filling or crack in the tooth. There may also be damage to the pulp tissue inside the tooth.
What To Do
See a dentist for evaluation. If the problem is pulp tissue damage, your dentist may send you to an endodontist. Endodontists are dentists who specialize in pulp-related procedures. Your endodontist will perform a procedure that cleans out the damaged pulp and fills and seals the remaining space. This procedure is commonly called a root canal.