I have a small lump at the back of my cheek along the jawline (about in-line with my back molar). It is actually inside my cheek and I can move it around a bit. It is just over 1cm in diameter and I have had it for a very long time; I probably noticed it when I was about 8 or so and I'm now 16. It is painless and very hard, and doesn't seem to have grown a noticable amount over the years.
Although it causes me no discomfort, I am curious as to what it is and whether I should ask a doctor about this.
Thanks!