text: sudden left arm numbness and pain up into shoulder and head. no vision problems. 50yrs old. diagnosis?   i would agree that you should see a doctor, however i think you should go to a reputable chiropractor.  i have worked for a chiropractic clinic for 4 years.  this could very well be something needing to be re-aligned in your neck or upper back.  it would explain some of the symptoms that you listed. good luck!!  do me a favor and let me know what you find out.  but please----------do not think that pain meds are the answer.  they only mask the pain for awhile, no problems are solved.