Numbness Below Kidney What Might Cause On And Off Numbness On My Leg Above The Knee, Below The Hip, Outside?

What might cause on and off numbness on my leg above the knee, below the hip, outside? - numbness below kidney

It started weeks with pain in the kidney area, it felt like a kidney stone. It was not like the pain disappears when I'm sitting or sport. One day I got up and the pain is terrible, as it was shut down and moved to this numbness in the legs. No pain, just numbness. If it takes just a nuisance, or it may be permanent nerve damage? I have great insurance and I know that a specialist if they cost a fortune. no experience with this or what could be? seems to happen especially when I'm sitting at one place or. It is strange, it can plant a knife in my leg and feel when it completely. Thank you!