Which condition typically presents with facial pain on one side and involves the fifth cranial nerve?

• A. Trigeminal neuralgia
• B. Bell palsy
• C. Meningitis
• D. Astigmatism

Answer: (C)

The scenario describes trigeminal neuralgia. The fifth cranial nerve is the trigeminal nerve, which provides facial sensation and parts of chewing muscles. Trigeminal neuralgia presents as sudden, severe, stabbing or electric-shock–like pain on one side of the face, following the nerve’s distribution. Triggers can be light touch, brushing the face, chewing, or other everyday activities, and the episodes tend to recur over time. This matches facial pain confined to one side and tied to the trigeminal nerve.

In contrast, Bell palsy causes weakness of facial muscles due to the facial nerve and isn’t defined by one-sided facial pain; meningitis involves fever, neck stiffness, headache, and systemic symptoms rather than a nerve-specific facial pain pattern; astigmatism is a visual refractive error with no facial nerve–related pain.