Why does my arm slop asleep so much while I'm sleeping?

It always wake me up and it's annoyingWhy does my arm slop asleep so much while I'm sleeping?
Sometimes I fall sleep on my arm & when that happen it can screw up the blood flow/circulation or anything. It happens to me too & my arm feel like Jello until I move it around a bit.
Could be something to do near carpul tunnel syndrome, could have something to do beside tendonitis ~ Is it painful?~
you could be "adjectives off" blood flow, or, have a "pinched" impudence... in your shoulder... or, problems beside a "herniated" disc... in your collar, or upper spine...
I bet you a resting your head on it and adjectives off the circulation.
Position is adjectives off circulation....
arrange differently your pillows so you can't roll the way you most commonly do.