I am 3 weeks out from a torn MCL. However, I have not done any ROM exercises until last night. It has been in an immobilizer this whole time. I think that has allowed scar tissue to build up. I can only bend my knee 45 degrees. I tried last night to do ROM exercises to the point of discomfort, but this morning I woke up with more swelling than I previously had. What do I do to gain ROM back, and should there be discomfort and/or swelling when doing these exercises? Like I said, I am concerned because I have started exercising it so late and am afraid of scar tissue build up. Everyone told me to keep it in the immobilizer.