I am having trouble falling asleep most nights. I usually try to lay on my back. However, when I do, my left arm has a tendency to either fall asleep or hurt. Sometimes sleeping on my side makes it better and usually I have to fall asleep with my arm across my stomach. I am admittedly overweight. I am about 290lbs, 5ft 11 and 32 years old. I also have sleep apnea and do sleep with a CPAP. Some nights are not so bad as others with regards to this issue, but when it happens, it is very difficult to fall asleep. I have been having this happen for about a year. I did go to a Family Physician who had me get nerve testing done on my arm and an xray, both of which showed nothing. I generally feel the discomfort in my elbow and thought it might have been initially caused by an arm hyperextension that happened about 3 years ago that may have caused permanent nerve damage. However, as the xray and nerve test showed nothing and occasionally I get the discomfort in my bicep or shoulder, I do not think that was the case.