Lump under jaw or chin 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 lump under jaw or chin, we could:
UNDER JAW OR CHIN: Do you have any swollen or tender lymph nodes here?
Possible responses:→ Don't know
→ Yes, swollen but not tender
→ Yes, tender but not swollen
→ Yes, swollen and tender