Hi, I'm 21, 5'2", and weight 129 lbs. I have a history of anxiety/panic attacks. I don't know if that is relevant, but it has been the most persistent problem of mine. For the past year and a half, I've had a recurring little, white bump appear on the inside of my right cheek of my mouth. It always appears in the same exact spot. Sometimes it gets larger. It has disappeared and then reappeared a couple of times. It's small, round, and hard to the touch. Sometimes it's white and sometimes it matches the color of the inside of my cheek. It isn't painful at all, just irritating and makes me self-conscious of my mouth, although I'm sure no one else can see it. What is this and how do I make it go away? Thanks