For several months, I have had an unexplained discomfort in my left arm just above the bend. My Dr. has taken x-rays and ordered an MRI. Today I had a Vascular Ultrasound done and will get the results in a few days. It is not a constant discomfort but comes in the form of a tightening just as if I had a rubber band around my arm. Sometimes it feels like I have rubbed "icy hot" on it. It is mostly above the bend but sometimes above my elbow. Does anyone have any ideas as to what this might be?