I get a reoccurring small bump in the back of my mouth that appears on my gums in between my top and bottom back molars. I have no pain, it just feels like I have a piece of food stuck in the back of my mouth. I can pop it if I scratch it with my finger. If I don't remove it, then it will pop itself after a few days anyways. It always comes back in few days after it disappears. I have had this for a about a year now. And when it pops it seems to be filled with fluid and does not smell or taste strange. I'm not sure what it is or if I can do anything to get rid of it.