Trigeminal neuralgia (TN), tic douloureux (also known as prosopalgia, the Suicide Disease or Fothergill's disease) is a neuropathic disorder characterized by episodes of intense pain in the face, originating from the trigeminal nerve. One, two, or all three branches of the nerve may be affected. It is "one of the most painful conditions known to humans, yet remains an enigma to many health professionals. " This pain may be felt in the ear, eye, lips, nose, scalp, forehead, cheeks, teeth, or jaw and side of the face; some patients also experience pain in their left index finger...