Waking up with a headache can have various causes, just like most other symptoms. 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 waking up with a headache, we could:
Do you ever wake up with a headache?
Possible responses:→ No / don't know
→ Occasionally - less than once per month
→ Often - at least once per month