NCLEX Review Guide: Bell's Palsy (Facial Paralysis)

Definition & Etiology

• Bell's palsy is a unilateral facial nerve (cranial nerve VII) paralysis of unknown etiology causing sudden onset facial weakness. The condition affects the motor function of facial muscles on one side, typically resolving within 3-6 months with proper treatment.
• Risk factors include viral infections (HSV, varicella-zoster), diabetes mellitus, pregnancy, and autoimmune conditions. Most cases are idiopathic with no identifiable cause.

Clinical Manifestations

• Unilateral facial drooping with inability to close the eye, raise eyebrow, or smile on affected side. Patient cannot wrinkle forehead or puff out cheek on affected side.
• Additional symptoms include drooling, altered taste sensation, hyperacusis (increased sensitivity to sound), and difficulty with speech articulation. Onset is typically sudden, occurring over 24-48 hours.

Immediate Care Priorities

1. Eye protection is priority - inability to close eyelid leads to corneal drying and potential injury
2. Apply artificial tears every 2 hours during day and lubricating ointment at bedtime
3. Teach patient to wear protective eyewear and tape eye closed during sleep
4. Monitor for signs of corneal abrasion or infection

Medication Administration

• Corticosteroids (prednisone) are most effective when started within 72 hours of symptom onset to reduce inflammation and improve recovery outcomes. Typical dose is 1mg/kg/day for 7-10 days with gradual taper.
• Antiviral medications may be prescribed in conjunction with steroids, though evidence for effectiveness is limited. Monitor diabetic patients closely when administering steroids.

Self-Care Instructions

• Teach facial exercises and massage to maintain muscle tone and promote recovery. Gentle upward massage of affected muscles 3-4 times daily helps prevent muscle atrophy.
• Instruct on proper nutrition techniques - eat slowly, chew on unaffected side, and use smaller bites to prevent choking. Risk for aspiration due to impaired facial muscle control.

Prognosis & Follow-up

• 85% of patients recover completely within 3-6 months without treatment, with higher recovery rates when corticosteroids are used early. Most improvement occurs within the first 3 weeks.
• Refer for physical therapy if no improvement after 2-3 weeks, and provide emotional support as facial changes can cause significant psychological distress.