<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, my left arm hurts from my shoulder to elbow and maybe a little below the elbow it has been hurting for a little while now. I have had ct scans and x-rays and nothing I even had it on my heart and nothing as well they say my heart is very healthy nothing is wrong with it as well. I do notice my left arm gets really cold sometimes also. What do i need to do.  <response>: Hi, The causes of pain from shoulder to arm are mainly of three types:1-Radiating - Referred pain are from internal organs like heart, pancreas, stomach, diaphragm2-Referred - Radiating pain occurs because of root compression of cervical spine3-Local to shoulder itself - local factors like ac joint arthritis, rotator cuff tear etc. To get an exact diagnosis you need to get a thorough clinical examination along with MRI cervical spine to rule out cervical pain. USG and X-ray chest to rule out causes of referred pain and MRI left shoulder for local pathology of shoulder. Take care. Hope I have answered your question. Let me know if I can assist you further. 