Hi. My left knee has been hurting for about a year. Although I can bare the pain, its annoying. I am on my feet all day, so I am used to it I guess. Just this morning I noticed a small lump on the inside edge of my left knee, and it has gotten progressively bigger throughout the day today. Started out the size of a pea. Now is the size of a ping pong ball, cut in half. I have ice on it to try to get the swelling down a little. It is not that painful, but feels hard, not mooshy. Any ideas?