Thanks for this, MrsD.

Perhaps related, I had something interesting happen last week that I was at a loss for explaining.

For about a year now, I've had "altered sensation" the two outer toes on my right foot. It just feels like my socks are bunched up in them...no pain. It's always just been those toes, not the other ones.

Last week while on a little trip, I climbed up a ski slope for no particular reason other than to get a good cardio work-out. My thrice-operated on right knee complained bitterly the next day, AND I suddenly had this altered sensation in my big toe for the first time ever. Not surprisingly I suppose, when the pain in my knee subsided after a couple of days, so did the sensation in my big toe. I'm now just back to altered sensation in those toes.

I'm going to try focusing on my knees as you suggest, and see what happens.