Left hand getting numb. : 14 yrs male!

My left hand gets Numb constantly. Everyday after I wake up my left hand ring finger is numb and does not get normal for a long time. When I try to get blood to my hand by standing at keeping the state while lying on bed I get a shooting pain in the area from elbow to underarm and on some parts of just close to my underarm. Even if I hold my phone for sometime by my left hand ring finger gets Numb and if kept for a long time the whole hand. Today morning, my whole hand was numb when I woke up and there was pain in the middle of my palm. The pain in the palm was not there until today. It keeps getting numb the whole day and it is very difficult and painful to get it back to normal. AGE : 14 yrs Male