I have noticed the same things, except it's usually my whole arm, sometimes both of them. It happens only at night (I have to sleep on my back since sleeping on my side starts the numbness) and sometimes it will wake me up. I haven't seen a doctor yet but I know I need to. I am 37, female, very active, in great shape and have thought it was just due to poor circulation. The tingling goes away after I stand up and let my arms hang by my side. It's predominately on my right arm and it's happening more and more often. Any input would be great.