trigeminal neuralgia
"Purchased the Trigeminal Neuralgia kit from Biogetica.  Big waste of money.  Did nothing for me.  

Side note;  I've had this condition (extreme facial pain, left side) going on about three years now.  At first mostly lighting bolt types of pain but now it's getting to last for five / ten seconds which will be unbearable pain.  Triggering it can be something very minor.  Touching any part of my head, light wind, eating etc.  Making an appointment now to see a specialist."