When it comes to experiencing pain after root canal, the level of pain that is experienced is usually an indication if it is a bad sign or not. It is quite common to experience some mild pain after the procedure, but it should dissipate within a day or so. If the pain intensifies, that is generally a sign of a complication.
It is good to keep in mind that the general rule is that the worse the pain was before the root canal treatment, the worse the pain will be during recovery. There is going to be increased blood flow to the area during the healing process, which can cause tenderness and pain. And it is also important to keep in mind that if the root canal was successful, the nerves will have been removed from the tooth, and it will actually be the periodontal tissues causing you pain, not the tooth itself.
If the pain is excessive though, it is possible that you have experienced a failed root canal. If your pain is accompanied with a re-infection in the tooth such as swelling, fluid accumulation or drainage, that is a bad sign. Sometimes a root canal is not cleaned properly, which could be a cause for the infection. If an instrument such as a root canal file was broken in the canal, this could also cause complications.
Contact our endodontist in Los Angeles if your pain worsens after a root canal procedure.