**Core Concept**
Bell's palsy is an idiopathic, acute peripheral facial nerve palsy characterized by unilateral lower motor neuron weakness of the facial muscles. The pathophysiology is thought to involve inflammation of the facial nerve within the facial canal, leading to demyelination and axonal degeneration.

**Why the Correct Answer is Right**
The treatment for Bell's palsy, particularly when initiated early, is corticosteroids to reduce inflammation and prevent further nerve damage. Corticosteroids, such as prednisolone, work by suppressing the immune response and decreasing the production of pro-inflammatory cytokines, thereby reducing the severity of the inflammation and promoting nerve recovery.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because antiviral medications, such as acyclovir, have been studied for their potential role in treating Bell's palsy, but their efficacy is still a matter of debate, and they are not the primary treatment.
**Option B:** This option is incorrect because anticholinergic medications, such as glycopyrrolate, are used to manage the symptoms of Bell's palsy, such as excessive salivation and tearing, but they do not address the underlying cause of the condition.
**Option C:** This option is incorrect because surgical intervention, such as decompression of the facial nerve, is generally reserved for cases of Bell's palsy that do not respond to medical treatment.

**Clinical Pearl / High-Yield Fact**
A key aspect of treating Bell's palsy is the timing of corticosteroid initiation, with optimal results seen when treatment is started within 72 hours of symptom onset.

**Correct Answer:** C. Surgical intervention is generally not the first line of treatment for Bell's palsy.