Long lasting pain can affect the mouth. This may have different causes and sometimes it is not related to any particular damaged or diseased tissue.
It is important to eliminate inflammation or infections around teeth as a source of this pain. It is also important to avoid doing unnecessary treatment on such teeth in the hope that this will resolve chronic pain as it may make it worse.
There are other dental specialists who may manage this type of pain, but it is important to eliminate other possible causes of this pain.