For the last few weeks i have had pins and needles in my left hand and fingers and its now started in my arm going to my elbow. The pins and needles has now started in my left foot and leg, stopping just below the knee. I started with depression and anxiety just before christmas and started staking anti depressants, which seem to be slightly working. Could the pins and needles be because of the depression? What could the pins and needles be cause by?