Hi and welcome to our little family,
I don't know if you have it in your knee or not. Does it feel like it did when you had it in your hand? What type of knee surgery did you have? I also had knee surgery that kicked my RSD into overdrive. I also got hematomas a lot after all my knee surgeries. I wonder if that has anything to do with RSD. I know when I get a cut, I bleed forever. Takes a long time to stop. If that's an RSD thing, that might explain the hematomas. What kind of symptoms do you have besides pain? If it feels like RSD to you, I suggest you see a doc that knows about RSD. Is this the same doc you saw when you had RSD in your hand? Does the doc who did your knee surgery seem to know anything about RSD. If not, I would try to find another one. Hope some of this helps. I don't really know what to tell you other than I hope it's not RSD and hope you feel better.
Sharon