In reply to Jayboy:
I have had similar (and to a lesser extent) occasionally. I sleep on my front and occasionally when my arm is high up the circulation cuts off (due to issues with my shoulder) and rhe next morning I can't feel or move and takes half an hour to get proper feeling back. Fo part the day I have no grip strength too. But never had any problems when I haven't slept awkwardly. If its more than one (maybe two) days, I personally wouldn't see a doctor. But anything after I certainly would. Having said that if you're at all worried its good to see a doc just in case. Most likely nothing but doesn't hurt to check.
Post edited at 00:46