Thanks jakealta! I certainly hope that's all it is. I'm very worried because it hurts so bad. I'm going to try the hot towel treatment ASAP. I have a call in to my doctor, but, again, he's in Mexico, so I don't think he'll offer much help immediately. This is also discouraging because the elliptical is my favorite cardio machine and I have gotten back up to 45 minuties. Maybe I did over-exert myself. I was also looking forward to getting back into the Insanity workout around 6 weeks post-op but perhaps that's a bit too soon if I can't even handle the elliptical. Thanks again for the info!