Do you have diabetes, vasculities, vitamin B12 or folate deficiency, drink alot of alcohol, osteoarthritis
, etc? Does the pain come and go, or is it the same every day? Are there specific areas in your shoulder and arm that hurt more than others? Where in your hand, which fingers hurt? How did the pain start? What is your age? Any medical problems other than your pain?
Pain medication might help but you need to find the etiology of the pain.