I know this is kind of off-topic, but I have maybe a minor or maybe a serious problem. Recently during a football game (just me and some friends) someones knee went into my thigh really hard - I left and went home right after. It swelled up to a good size, but did not bruise. I read somewhere that if I bend my legs and stretch the muscle, it will heal faster. That was fine, until the day after the accident (which is today.) it hurts more when I do that, and now my knee pops everytime I bend it. Is that a coincidence or a side effect? I heard about calcification occurring sometimes, or some condition where nourishment does not get to a muscle group where the contusion has occurred. The muscle has not swelled up too bad, its just a noticable increase in size...This wont create permanent damage other than some minor scar tissue will it?