For a long time I have had this odd symptom. I sit down and cross my legs, where pressure from my knee is put on my calf or upper leg depending on how I am sitting. I am fine while I am sitting there but after I uncross them, which ever leg was on top will go all pins and needles. I don't see how this could be circulation since it doesn't happen while the legs are crossed. It seems like I put pressure on a nerve and that releasing the pressure triggers the pins and needles. This doesn't make sense to me and is worrying me. Does anyone else get this?