Why does my vanished thigh dance numb when I stand or way of walking for a time of time?
Answers: Sciatica?
At first blush, it sounds like sciatica.
Go see your doc.
You could hold a pinched nerve. I own had backbone problems and nerves being pinched so I do know for a time about it. I would consult a doctor. I enjoy heard of unalterable nerve break when things are not looked into. Good Luck! You have poor blood - circulation surrounded by the legs
sounds like poor blood circulation to me. See a doctor if it bothering you or it become worse or worrysome. it could be muscle contractions check with your doctor