Tag Archive - dead tooth hurting

[Q&A] Infection in a root canal treated tooth

A reader asked:

“I got a root canal done in 1999. However, it has recently started hurting. :(. It’s a dull ache that comes and goes. I saw a dentist and she told me that I need a re-root canal as there is an infection. This was 4 months ago… if a root canal is done it cannot get infected right? I mean the tooth is already ‘dead’. How can it hurt?”

Ideally, a root canal treatment (RCT) done properly shouldn’t cause any problems. But here’s a list of things that could have gone wrong:

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