Hi.\n\nI've got a tooth that I've had trouble with for quite a long time. Just over twenty years ago I had a filling replaced and a root canal done on it. Subsequently I've have had to have the filling replaced a few times as it fell out. The last time left hardly any support for the new filling, after the drilling, and that eventually fell out too. I left it quite a while (years) before seeing another dentist, and when I did see one he told me that there was some decay because I had left it so long, and it may need to be extracted. Seeing my reaction to this he said that he could try and save it by drilling out the decay putting a crown on it, which he did. This was in September/October 2017. The tooth was fine after this, until about a year later around the end of August last year. At this time I had some hot food burn my gum in the same area of my mouth. Ever since then I have had a re-occurring puss filled spot just above the crowned tooth, which I believe is an abscess. What I'm concerned about is this due to the burn, or was that coincidence that it occurred at the same time, and there is something wrong with the tooth? Also, what I'm really worried about is exactly what the treatment the dentist is likely to do, as I've been reading worrying things on the internet about it. I have no pain, but as I say, the tooth has had a root canal. Am I worrying about nothing?