DR RV ANAND SAI NEUROCLINIC MYLAPORE AND MANDAVELI pain in a particular nerve root is called neuralgia. there are 12 pairs of cranial nerves coming from the brain.the 5th pair is called trigeminal nerve.pain in the area supplied by this nerve is called trigeminal neuralgia.it can be any of the 3 divisions supplied by the nerve.it can be in the fore head, upperjaw and lower jaw.commonly it affects upper and lower jaw