Hello! I am 25 years old. At the age of 15 I already had root canal treatment and canal filling of my upper first molar. The tooth does not hurt, is not sensitive to hot or cold, and even light tapping tests do not cause any pain. Because a filling was not the best solution for it, last year I replaced the filling with a crown and post. I told the dentist that the tooth feels normal, except that the gum around it seems somewhat thicker than around the first molar on the other side. On the lip side, right at the root tip, I have felt a small lump since the treatment that is tender to touch. It is the same colour as the gum and does not discharge or burn. It looks as if there is fluid underneath. The dentist removed the filling and cleaned the roots again, which had already been treated once (I think only three had been treated), inserted a post and placed a filling. The X-ray showed that it had been done well. However, I still have the thickened gum and a small flexible lump above the root tip, which is not present over the first molar on the other side of the dental arch. Do you perhaps know what else could cause the thickened gum and lump? Is it some kind of inflammation without pain? Do you think my dentist should refer me to a specialist? I forgot to mention that during the second cleaning of the canals, he could not insert that special file all the way because a small piece of something was blocking access. Therefore he did not go any further and cleaned as much as he could.