The Gasserian ganglion or trigeminal ganglion is important in the treatment of some types of facial pain like trigeminal neuralgia. The Gasserian ganglion block is a short, minimally invasive procedure that is done using local anesthetic to inhibit the signals going through those nerves and control facial pain. It is primarily indicated in treating trigeminal neuralgia facial pain. Also it is considered a diagnostic procedure to the condition. With successful pain control after the block, longer term pain relief can be achieved in some conditions by doing what so called Radiofrequency Ablation to the same nerve fibers. The procedure can be performed under fluoroscopy.