Hello it’s better to post an x ray so that we can judge

You will av get rvg/X-ray done of the tooth to see if there is re infection.and even if there is it can be retreated.

Root canals are re treatable if they are re infected . Pls go ahead but u can have a second opinion by posting an existing xray

Re RCT can be performed on a tooth which is previously treated by root canal treatment if it gets Re infected. It is also possible that the previous root canal treatment was not completed properly but that can be judged only after a look at the X-ray of the tooth. Please post one if you have. Otherwise going for a re RCT is a prudent step to save the extraction of the tooth and alleviation of the symptoms permanently. An endodontist will be the best person to take care of such cases, although any dentist with a considerable experience can also do a good job. Regards