I have a recurring pain in my left arm that starts at my elbow and radiates down toward my hand, almost as if I have hit my "funny bone". This pain starts with initial exertion from rest. If I continue the exertion, e.g. walking, jogging, etc. for about 5 minutes or so the pain always subsides and eventually goes away altogether. After this, I can continue to exercise at a vigorous rate or for an extended time without any pain. I have had a stress echo test which came out absolutely normal. I do have GERD and possibly a hiatal hernia, and I wonder if there might be some connection. I experience no chest pains at any time. Any insight on this would be appreciated.