|I was recently trail running in N. Calif, deliberately went off trail, scratched my left knee/leg on some brambles and apparently also went through some poison oak. I have all the classic symptoms on both legs, etc. but also have experienced severe knee pain/soreness since the exposure. PT has confirmed swelling, etc. but is at a loss as to cause of knee problem. There was no known strain event, popping, etc. Has poison oak exposure ever been implicated as causing joint pain and swelling?