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.
Hello read through your query, and accordingly I feel that there is nothing to be worried in this case. It might be due to some filling material entering your maxillary sinus. It will be fine in few days time. Continue with your antibiotics. After few days if It's still paining you can meet an oral and maxillofacial surgeon or ENT surgeon and get it treated. They may do a small surgical procedure and clear your sinus. Be cool and don't be tensed. These are few things which happen in life which can be relieved easily if you stay calm and cool. Stressfree mind can be best medicine for all diseases. Hope you are benefitted something from this reply. Have a healthy day!!!