Last wednesday, I noticed a slight pain in my right knee. It was not much, and it went away for hte most part. The next day I went rock climbing, and that made it feel a lot better actually. It was completely gone for the next few days...until Sunday. Now, it's sometimes hard to walk. And I noticed my right knee is visually much larger than my left, not to mention I can feel the inflamed tissue. Well I can't figure out why this is. I've not done any sort of physical activity outside of thursdays rock climb, and it started before that. It just seems to have come from nowhere.
My hip and ankle joints feel normal. I'm putting ice on this now. Does anybody know what this could be? And why it came to exist?