I've had both knees replaced without any issues. I did get IT syndrome years ago when I was a runner. That was fixed by stretching the IT band.

One easy way to do this is to stand and cross one foot over and right next to the other. Try to touch your toes, go as far as you can. Keep knees straight. Hold for 30 to 60 seconds, cross feet again and repeat for the other side. Ice is also helpful.