Tingling in left arm
Just a quick question, I have recently developed a tingling in my left arm that runs along the top of my arm down to the top of my hand. This is also very positional, for example when I was flying home last week it would come on when I crossed my arms, but would go away when I straightend them out. Also, when I lean on my left arm when working at my desk or have my left arm our the window of the car, in all cases it goes away quickly when I change the arm position.
Where should I start to look for an answer. I just had my annual cardiac work up two months ago and the echo and EKG were fine. Also, I do 45 minutes a day on a treadmill without any issues so I don't think it's heart related. I feel like it comes from my left shoulder or even from my neck. I am a 49 year old male about 50 pounds over weight but down 50 pounds this year.
Any suggestions on where to start?