Q. I hope that you can help. For the past week I have had a very soregum behind my front tooth not on the gumline but further down on or under the tooth dump. It is only sore behind the one tooth, and is very painful even if just touched by my tongue and the gum pulses after touching. The tooth feels great above the gum line no sensitivity and pain feels like it pulses through it just the gum. I have has a swollen glands for the last 3 days and dentist said that this was the reason and that it will clear up naturally. I had xrays and they have come back all clear. Why would only one tooth be affected by this as gums next to the tooth don’t hurt one bit? and is their anything I do to help the situation out. ie medicated mouthwash etc Please help even eating is very difficult now. Could the tooth need root canal or extraction without proof on xray”