I have surface numbness just above my rgt knee and middle toe on my lft foot. i've had disc issues in the past. take zoloft, (sertraline) adderall and prednisone?

Pinched nerve: Something is irritating a nerve, specifically a branch of the 5th or slum bar vertebra or first sacral vertebrae both, or the peroneal nerve, which wraps around the lateral upper joint in your knee. You need a good examination it could conceivably be coming from the pinched nerve in your back, providing its either at L5 or at s1.