Hi,
I am a 35 year old, relatively healthy woman. I have been experiencing my arms going numb while sleeping for about a year now. It started with my wrists, then progressed to both arms going numb and walking me multiple times a night. Sometimes I could wake them easily, and others it would take 5-10 minutes to get the blood flow back. My arms also tingle during the day doing some activities, like holding them up in the air.
I was going to a chiropractor at the time and she said it was due to my neck (see previous posts for more information. I found wikipedia to be a great resource as well). She recommended wearing a wrist brace at night in addition to regular adjustments. I found some improvement, but the numbing still occurred.
Due to the busy holiday season, I haven't seen my chiropractor in a couple of months. My right arm was consistently falling asleep every night, often multiple times a night. I also had a good kink in my neck. A new yoga studio opened up a couple blocks from my place and I decided to go for my general health.
The first time I went, it was difficult to have my hands support my weight. They tingled and ached but held. The instructor said to hold our tummies in, drop our shoulders, and keep our head up straight. I tried to do all three during the class, throughout the rest of the day, and also at night. That night, only my right hand went to sleep. The next day, my neck readjusted a bit.
I went a second time, and my wrists felt stronger, although they still hurt to hold my weight. That night, I had no numbness. It's a week later now and I've gone one more time and still, no numbness at night. It's amazing.
I can't say if it will work for you, but it is definitely something to try. I had faster and better results with a couple of sessions of yoga (Vinyasa) than I did with chiro. My guess is that there are two things that helped: 1. Stretching my wrists in the yoga poses, 2. Dropping my shoulders, even while sleeping (ie. better posture).
I hope this helps! Best of luck.