Characteristics of idiopathic or atypical facial pain
| 1. Site | Deep non-muscular areas of face, unilateral or bilateral, does not follow nerve distribution |
| 2. Radiation | Poor localisation |
| 3. Character | Throbbing, deep, diffuse, boring, nagging |
| 4. Severity | Moderate to severe |
| 5. Duration | Weeks to years |
| 6. Periodicity | Continuous, but can have prolonged pain free periods |
| 7. Provoking factors | Stress, fatigue |
| 8. Relieving factors | Rest, tricyclic drugs |
| 9. Associated factors | Anxiety, depression, other bodily pains |