Welcome to Bonesmart!!! The first 2 weeks are the worst, and I'm glad you're progressing. As for the sharp pain you're experiencing, I remember it well---in the same spot! My right TKR was just 7.5 weeks ago, so my memory is
very fresh. My sharp pain was at the bottom of my incision, and there was absolutely no rhyme or reason to it. Sometimes it felt like an invisible person walked up to me and stabbed an invisible ice pick into that lower inch of the incision---even if I was just sitting still. I remembering thinking it odd because it was the last inch
below my knee, and not where the incision/skin was being pushed/pulled as I moved or tried to bend.
@lovetocookandsew was recently explaining this to
@ArmyVet a while back in his Recovery thread. I found it super interesting because it happened to me at about the same time in recovery as it did him, though mine lasted a good 2 weeks, on and off. Maybe they will see this and chime in.
She explained it as possibly "stem tip pain," as that's the approximate location of the implant's stem in our tibia bone. As our leg moves, the rod is metal and doesn't bend, but our bones DO bend. So when we move, sometimes the tip of the stem touches the bone. Then the nerves in the bone get shocked, thus the pain.
Supposedly as the bone fills in it stops, but I will still get an occasional zinger there---again for no rhyme or reason, and often when sitting still. They are less and less though over the last few wks. Again, for reference, I'm at 7.5 wks post-op, but it happened numerous times a day during weeks 1-3.