Dark spots on gums 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 dark spots on gums, we could:
Do your gums have dark spots or areas?
Possible responses:→ No / normal pink color / don't know
→ Yes, at least one
→ Yes, more than one, or a larger area