Numbness and pins. and needles right arm and hand?

Consider nerve : Possible nerve compression at elbow or wrist, but could be higher in shoulder or neck. See a doctor, consider an EMG study.

Not enough info.: Pins and needles are paresthesias. The nerve or nerves are not getting enough blood flow. Without more info like how long this has been going on, which parts of your hand/fingers are effected, is there any difference betwwen day and night, how's your health otherwise? Without more info, i can't give you a better answer.