yes hello, i have noticed a white pus like little sac that has been forming in the same spot for the last week. i can pop it, there is no pain but notice a sensitivity on the gum in that area, have a crown near the spot where it has been forming. thank you
Hello, thank you for consulting with Chat Doctor. It looks that it is sinus opening.  Actually the tooth with the cap might be infected, because infection causes pus in the apex of the tooth whicChatDoctores out through a hole on the gums called as sinus. Better that once you should visit your dentist and get an x-ray done of the tooth which will show the infection. Hope it will help you.