If experiencing toothache pain under a filling, it is important to see a dentist as soon as possible, according to Mayo Clinic. In the meantime, toothache can be treated at home with over-the-counter pain medication.
Other things that can be done about pain under a filling include rinsing with warm water and attempting to remove any debris from around the tooth with dental floss. The Mayo Clinic also suggests that temporary pain relief may also be found by applying clove oil to the tooth and gums. Relief can also be found with antiseptics that contain benzocaine.
Tooth decay is the main cause of tooth pain under a filling, and that decay can eventually lead to infection if not addressed by a dentist, according to Mayo Clinic. Even if a filling is in place, it is still possible for decay to begin under the filling as it can fracture or split.
Typically, toothache pain is not serious, but if the pain is accompanied by a fever, if it lasts for more than a day or two and if there is swelling around the tooth or gums, the tooth could be infected. An infected tooth needs to be treated by a dentist as it may require a root canal, according to the American Association of Endodontists.