Why does my foot keep tingling regardless of the position i'm in? the hand on the same side tingles to..

Causes of tingling: If it only involves the foot could be a local entrapment or something in your lower back. Same goes for your hand. The way you hold your hand, how you sit, may be playing a role, but this is something that should be discussed with a physician like a neurologist who can do the proper exam and arrange for studies if required.