when ever I cross my legs for even a short peirod of time the one on top will get numb. when I rest my head on my hand and prop my arm on somthing my hand will go numb. now I have had this in the past but my body had to be in that position for a long time, now it is only a matter of seconds and I go numb. I thought it was circulation but I've been told it's the ms. good luck.