HI,

I too get facial numbness and end up with my eye nose and face up to top of my head numb totally not any feeling but also intermittent pins and needles. My ear goes deaf my eye goes weird feel like a finger behind it poking it out of my head!!!

I get this when the back of my neck the top at my head where it meets my neck......trigger points that may refer to this area... or compression in brachial plexus.

http://www.sd-neurosurgeon.com/diseases/tn.html
interesting info

http://facial-neuralgia.org/conditions/tn.html
good site

good luck....
love and hugs,
Victoria