There is quite a variety of facial pain that affects people. Trigeminal Neuralgia itself is classic in the sense that there are certain types of symptoms you get which makes it a clear clinical diagnosis of Trigeminal Neuralgia.
Some patients find the symptoms may evolve, change, and develop atypical features, meaning features that are not so commonly seen in the classic form. These may have a cause similar to Trigeminal Neuralgia, but just a bit different. Dental problems or headache may also affect the face.