What symptom is NOT characteristic of Bell's palsy?

In Bell's palsy, a condition characterized by sudden, unilateral facial paralysis, certain symptoms are typically observed. The inability to close the eye on the affected side, drooping of the corner of the mouth, and drooling are all common manifestations due to the involvement of the facial nerve, which controls muscles of facial expression and some functions related to salivation and blinking.

The inability to swallow is not a characteristic symptom of Bell's palsy. While the facial nerve is involved, it primarily governs facial muscles and does not directly control the swallowing process, which is primarily managed by other cranial nerves (like the glossopharyngeal and vagus nerves). Therefore, while some patients may experience difficulty in swallowing due to associated weakness or changes in sensation, it is not a hallmark of Bell's palsy as the other symptoms are. This distinction is crucial for a correct diagnosis and understanding of the condition, highlighting that while Bell's palsy affects facial muscles and expressions, it typically does not involve the swallowing mechanism directly.