My left hand keeps going numb. it starts off at my pinky fingertip, it starts to tingle then eventually one by one that whole side of my hand goes numb. if i leave my arm straight it goes away but if I bend my arm or rest my elbow within seconds my hand goes numb again. This has been going on about 2 weeks. My hand and fingertips are numb all the time. does anyone know anything about this (pinched nerve?) or anything I can do to make it go away permently?