What can be done for a throbbing pain in my left shoulder when I lift my arm?

Evaluation. If you have tried conservative treatments, ie ice or heat, acetominophen, asa, Ibuprofen or Naproxen without relief have it looked at.
Shoulder tendonitis. This could be a symptom of a rotator cuff ( shoulder tendon) problem. A through examination with an orthopedist or rehab doctor would be best to properly identify the cause.

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