Trigeminal neuralgia is a severe pain in any part of the face, which lasts a few seconds but with a repetitive frequency. This appears, usually, in the people more than 65 years old, mainly on women. The surgical treatment of this pathology has reached its maximum effectiveness through the surgical microdecompression under microscopic magnification of the nerve in the posterior fossa, being at the present time, the vascular microdecompression, the treatment of choice, against the old treatments of Gasserian ganglia compression and chemical destruction of the ganglia.