question: My dentist has performed the first stage of root canal 4 times as my tooth is still sore.  I have a painful lump high up above this tooth and have had X-rays and cone X-ray to see what it could be. The dentist said it looked like a piece of metal in my gum but he is not sure what it is.  The lump is still painful and it feels like something is in my nostril. I have had 2 courses of anti biopics and it is still not cleared.