Shoulder pain can have various causes, ranging in severity from 'worrying' to 'needs attention'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose shoulder pain, we could:
Do you experience shoulder pain?
Possible responses:→ No / don't know
→ Yes, due to physical injury
→ Yes, it is a minor problem / comes and goes
→ Yes, one hurts most of the time (not from injury)
→ Yes, both hurt most of the time (not from injury)