trigeminal definition
Overview Trigeminal neuralgia is a chronic pain condition that affects the trigeminal nerve, which carries sensation from your face to your brain.If you have trigeminal neuralgia, even mild stimulation of your face â such as from brushing your teeth or putting on makeup â may trigger a jolt of excruciating pain.rigeminal neuralgia is a chronic pain condition that affects the trigeminal nerve, which carries sensation from your face to your brain.