Okay, did get this with one arm, for a very long time, but for me there was a specific reason for it, and I don't want to scare you.
For me it was because when I raised my arm above my head, it caused the blood vessel to be pinched off in the neck area, and I had to have an op to release it. Turns out it was a genetic birth defect, which I have passed onto my DS1, so now he has to undergo the same op.
I have had bouts of the same arm falling asleep again since, and was advised by an "all Knowing" (yeah, right in your dreams) doctor, to conciously think about NOT raising my arm before falling alseep. That was all the help he gave, and he was a supposed specialist
Having been there I would ask for some one to check your pulse while you raise your arm above your head. If the pulse falls away then go to the GP, and point it out to them, this is a RARE defect. I have had to speak to DS1's new GP over the phone to explain it, as she had never heard of anything like it. It does involve an operation callled a Scalenotomy, if you are affected by it, and the surgeon who saw me, said he was lucky if he saw one every 20yrs.
other than doing as ejit dr said, if the pulse doesn't fall away, then I don't know about anything else that could help at present, but I am waiting to go to Leeds, and fully intend to raise it with the Prof, as I still wake with dead arm, so will keep you posted.
Professional Hypochondriac and Attention Seeking mother! Familial JHS/EDS3, F/M, 22/3/2010
Skake(Thats the Tremor) Rattle(That's the tablets) and Roll(in and out of anything) all the way.Hypermobile 2005