Okay I just want to start out by saying that I know this pain isn't due wisdom teeth coming in because I had mine taken out 3 years ago. The gum area behind my last tooth is painful and it looks like there is a bump. It doesn't really hurt if I don't touch it but it hurts when I eat and brush that area. I first noticed this because the tooth it's next to is somewhat loose now and it's concerning me. I went to the dentist and he deep cleaned the tooth but he said he didn't see anything wrong.