The trigeminal nerve, being the fifth pair of cranial nerves, branches into three divisions after emerging from the skull. The first division is the ophthalmic division, which innervates the upper eyelid and superficial parts of the eye and forehead. The second division is the maxillary division, governing the cheek, upper lip, and gums. The third division is the mandibular division, which affects the lower lip and gums. Trigeminal neuralgia is pain that occurs in the areas innervated by the trigeminal nerve, typically affecting one side and primarily involving the second and third divisions, with the second being the most common and the third next, while the first division is rare. The pain of trigeminal neuralgia can be confined to the area of one division or can occur in two or all three divisions simultaneously.