u/EquivalentWhile8600

Hello! Last year i had a discolored tooth (blue) from what i presume was a bad root canal. i had a crown put on and after that a abcess apeared in the roof of my mouth,which was painful but after it popped a abcess popped up on the top gum above the tooth with a crown. what would need to be done, i hope i dont have to take the crown off. i mention that until the crown was put on i didnt have this gum abcess