I bumped my lip a few weeks ago at a martial arts class. It cut itself on my teeth. It only bled about as much as a paper-cut, so very minorly, and of course i got a goose egg. A few weeks later the cut is healed but i still have a small hard "bump" in my lip, as if the goose egg coalesced into a small mass that isn't going away. What is it, will it go away on its own even after 4 weeks? Or is it something, like an abscess that I will need drained?