Hi Rachael; I get this symptom as well. It is usually both arms, shoulder's and especially at both elbows. I had more emg studies, about a month ago. There is some compression at the elbows but not enough to warrant surgery for an ulnar nerve release. I find it's brought about from carrying, sweeping, mopping and sometimes just the way I hold my arm(bending it). Just a guess that the nerve bundle is compressed at the thoracic inlet and there's not enough room for the ulnar nerve. Just one of the many nerves that can be affected from imflammation. I have a certain amount of pain everyday but some activities really can flare me up more. Just pushing a grocery cart or carrying mail back from the mail box with my arm bent increases the pain in my upper extremity. Take Care