I have a gum-colored pimple on my gum, beside a lower-left molar which
had a RCT years ago. The endontist said she would have to re-RCT the
tooth and, if there were cracks in either of the two roots (which
would indicate a bacteria problem), the tooth would need to be
extracted and I would need either a bridge or a crown.

This was two months ago when I told her I wanted to wait a while
before treating the tooth. In the meantime, I have increased my
vitamin C intake and the pimple is disappearing. (I'm not sure, of
course, if it is because of the vitamin C.) I figure this is not
necessarily good news. It's not going to heal any possible crack the
root(s) of the tooth or kill any possible bacteria, I don't believe.

Is my endontist correct in her diagnosis? As long as there is no pain
(yet), am I causing any damage by waiting? Can any possible bacteria
spread and cause any problems? Could this effect my general health?
Thanks.