I would still go to the dentist to have it looked at. You could have a cavity under the gum line where you can't see it. That's what happened to me. The cavity was under my gum line and I got a painless knot right above that tooth.
This could be something totally different but dentist's know about the whole mouth. You may have cut your gum on a piece of hard food and it caused an infection. Have it checked out and let me know how your doing. Take care. Remar
I would have thought that too, but my teeth are in excellent condition and the knot doesnt hurt.. at all..
It could be an infected tooth. You should probably see your Dentist. Take care. Remar