You can also get a nasty reaction should the injection not be "aimed" quite right.
Honeybunch, Thanks so much for your reply. I don't have enough posts to send personal messages yet. My MCL tear was indeed a twisting injury, I fell skiing and twisted it on the way down. Injury did not heal well and was not handled well by first OS. Eventually got most of my motion back but have been plagued by pain,swelling ever since. fast forward to Eflexxa, it was a disaster and I had to xl second two injections. My knee is much worse than before it, and good knee is very painful too from putting in overtime. I just got my own copy of last MRI and it indicates that MCL thickening,inflammation have decreased but shows subtle chrondomalacia, as well as a tilted patella, subluxed laterally. Not sure why doc didn't,t mention this! Am seeing him Friday and will bring up. Do any of those symptoms sound like what you had with your Osteochrondal damage/underlying cartilage tear? How did they finally diagnose it? Would love to hear all about it!