Hi. I haven't had knee replacement surgery but do know that they are always concerned about deep vein thrombosis(DVT) which can have similar symptoms to what you describe. Have you talked to your doctor about the pain? Do you have any redness or heat in the painful ares? If DVT isn't an issue maybe the pain is just from the way that you are now walking with your new knee. It may take some time for the muscles to adjust and it may get better as you heal. I would talk to you doctor or physical therapist about this. Good luck. Lisa
If I can laugh at it, I can live with it.