@eltje It is frustrating when the doctors don't know or can't provide an explanation for this.
I've been dealing with numbness and sharp stabbing pains in my left foot. My GP ordered an ultrasound to check for blood flow issues in my legs. That was normal. He prescribed Gabapentin for me to try for the shooting pains. (it helps) But my rheumatologist said that the prednisone "typically" wouldn't cause the numbness. All I know is that the tingling started when I was first dealing with the PMR pain when I was first diagnosed in March. It gradually got worse after taking prednisone. I'm inclined to think that there is a lot we don't know about the effects of prednisone on the body.