Dry eyes and chronic blepharitis do not cause trigeminal neuralgia. However, these conditions may exacerbate the symptoms.
The main causes of trigeminal neuralgia include multiple sclerosis or compression of the ganglion due to a tumour.
Effective treatments are known to include neuromodulators including anti-convulsants like Tegretol, carbamazepine, anti-depressants (nortriptyline, amitriptyline).