10/4/2025

Ramsay Hunt vs. Bell’s palsy — how to distinguish them?

Author: NeuroFace

Facial nerve palsy is one of the most common disorders of facial expression that affects appearance and daily functioning. The two most frequent causes of sudden weakness of the facial muscles are Bell’s palsy and Ramsay Hunt syndrome. Although both conditions lead to unilateral facial nerve palsy, they differ in cause, symptoms, and prognosis. Knowing these differences helps recognize the threat more quickly and contact a doctor at the right time. The article below simply explains the key features of both conditions, indicates when urgent specialist care is needed, and describes how the NeuroFace app can support rehabilitation.

What is Bell’s palsy?

Bell’s palsy is a condition in which there is a sudden weakness or paralysis of the facial expression muscles on one side of the face. The cause is inflammation and swelling of the seventh cranial nerve, i.e., the facial nerve. The exact mechanism of the disease is not fully understood, but viral infections (e.g., herpes simplex virus), autoimmune diseases, and stress are believed to play a role. Main symptoms include:

• Sudden onset - muscle weakness develops over several hours or days.
• Drooping of the mouth corner and difficulty closing the eyelid; the face becomes asymmetric.
• Disturbances of taste, tearing and eye dryness. Sometimes ear pain or headaches occur.

Bell’s palsy is usually not dangerous. In most people the symptoms resolve spontaneously within several months. Nevertheless, sudden weakness of one side of the face always requires medical consultation because a similar picture can occur in a stroke. A doctor may order tests to exclude other diseases and initiate anti-inflammatory (steroids) or analgesic treatment.

What is Ramsay Hunt syndrome?

Ramsay Hunt syndrome (RHS) is a rare condition caused by reactivation of the varicella-zoster virus (chickenpox/shingles). After a chickenpox infection the virus remains dormant in nerve ganglia, and later reactivation in the region of the facial nerve can cause paralysis and pain. The classic triad of symptoms consists of:

• Unilateral paralysis of the facial muscles (similar to Bell’s palsy).
• Severe ear pain (otalgia), which often precedes other symptoms.
• Vesicular rash on the auricle, ear canal, or tongue.

Additionally, other symptoms may occur such as hearing loss, tinnitus, dizziness (vertigo), hyperacusis, and taste disturbances. In some patients the rash may not appear at all — this variant is called zoster sine herpete and can be difficult to distinguish from Bell’s palsy. RHS is more serious than Bell’s palsy; only about 70% of patients regain full function, whereas in Bell’s palsy over 90% of people return to normal facial expression.

Key differences between Bell’s palsy and Ramsay Hunt syndrome

Although both conditions lead to a similar sign — sudden paralysis of the facial muscles — there are important differences. They are presented below in a clear form.

Cause and mechanism

• Bell’s palsy: the cause in most cases remains unclear; it is often associated with an inflammatory process or viral infection that leads to swelling of the facial nerve.
• Ramsay Hunt: clearly linked to reactivation of the varicella-zoster virus (shingles), which attacks the facial nerve and nearby structures. The rash and ear pain result from involvement of the geniculate ganglion of the facial nerve.

Clinical symptoms

• Bell’s palsy: sudden facial asymmetry, drooping of the mouth corner, difficulty closing the eyelid, taste disturbances and sound sensitivity. Symptoms appear suddenly and reach maximum severity within 48–72 hours.
• Ramsay Hunt: in addition to muscle paralysis there is severe ear pain and a vesicular rash on the auricle, ear canal or in the oral cavity. It is often accompanied by dizziness, tinnitus, hearing loss and balance disturbances.

Prognosis and course

• Bell’s palsy: most patients recover full function within several months. In about 10% of people synkinesis (involuntary muscle contractions) may develop.
• Ramsay Hunt: prognosis is worse — about 30% of patients may have permanent facial deficits. Symptoms are often more severe and the risk of synkinesis is higher.

Additional differences

• Rash and ear pain: characteristic for RHS, rarely occur in Bell’s palsy.
• Other nerves: in RHS additional cranial nerves may be involved (e.g., the vestibulocochlear nerve), leading to auditory and balance symptoms. In Bell’s palsy usually only the facial nerve is affected.
• Duration and severity: in RHS paralysis often develops faster and is more severe than in Bell’s palsy, and recovery takes longer.

When to see a doctor urgently?

Sudden weakness of one side of the face always requires prompt medical consultation because it may be a symptom of stroke, which is a direct life threat. The Cleveland Clinic emphasizes that Bell’s palsy symptoms are similar to stroke symptoms, so immediate examination is necessary. In Ramsay Hunt syndrome rapid initiation of treatment is crucial — Banner Health notes that administering antiviral drugs and steroids within 72 hours of symptom onset significantly increases the chance of full recovery. In practice you should see a doctor immediately if you experience:

• Sudden drooping of the mouth corner, difficulty closing the eye or loss of facial movement - do not wait, because early diagnosis enables faster treatment.
• Severe ear pain or a rash around the ear/face - may suggest reactivation of the varicella-zoster virus and require antiviral therapy.
• Additional neurological symptoms such as dizziness, tinnitus, hearing loss or balance disturbances.

“RHS can cause serious and long-lasting problems if not treated quickly. Treatment within three days of symptom onset provides the greatest benefit,” emphasizes Dr. Heather Coffman, an otolaryngologist at Banner-University Medicine.

Diagnosis and treatment

Diagnosis of both diseases is based on clinical examination: the doctor assesses facial expression, checks for the presence of rash or ear pain, and reviews the medical history. Additional tests such as electromyography (EMG) or imaging studies (MRI) may be necessary to exclude other causes of facial nerve palsy. Treatment includes:

1. Anti-inflammatory and antiviral drugs - in Bell’s palsy steroids (prednisone) are mainly used to reduce nerve swelling. In RHS antivirals (acyclovir, valacyclovir) and analgesics are added.
2. Eye protection - if the eyelid does not close fully, moisturizing drops, ointments and sometimes patching of the eye at night are necessary to prevent corneal damage.
3. Rehabilitation and physiotherapy - facial muscle exercises, massages and electrostimulation help restore muscle function and improve symmetry.
4. Regular follow-ups - control visits with specialists (neurologist, otolaryngologist, ophthalmologist) allow monitoring progress and early detection of complications.

How NeuroFace can help

The NeuroFace app was created to support people with facial nerve palsy in rehabilitation. Thanks to a simple mobile interface:

• It offers facial expression exercises that can be done at home.
• It enables progress monitoring - the app records exercise sessions and helps observe changes in facial expression over time.
• It reminds users to perform regular exercises and educates them about eye hygiene, skin care and safe rehabilitation practices.
• It collaborates with specialists - data from the app can be shared with doctors and physiotherapists, allowing better tailoring of therapy.

NeuroFace does not replace a medical visit, but it can be a valuable complement to professional rehabilitation. Our goal is to make daily work on facial expression easier for patients and provide motivation for regular exercises.

Summary

Bell’s palsy and Ramsay Hunt syndrome are two different causes of unilateral facial paralysis. Bell’s palsy is usually transient and not dangerous, and its cause often remains unknown. Ramsay Hunt results from reactivation of the varicella-zoster virus and is characterized by ear pain and rash, with a worse prognosis. In both cases prompt medical attention is crucial to exclude stroke and to start treatment as soon as possible. The best outcomes are achieved with early pharmacological therapy, eye protection and regular rehabilitation. The NeuroFace app can help with daily facial exercise, but contact with a physician and physiotherapist remains the most important element.


Sources

• Cleveland Clinic – information about symptoms, causes and the need for rapid consultation in Bell’s palsy (my.clevelandclinic.org).
• Banner Health – differences between Bell’s palsy and Ramsay Hunt syndrome and the importance of treatment within 72 hours (bannerhealth.com).
• StatPearls/NCBI – description of the classic triad of RHS symptoms, the variant without rash (zoster sine herpete) and comparison of prognosis with Bell’s palsy (ncbi.nlm.nih.gov).
• Cleveland Clinic – statistics on incidence and symptoms with additional information on other conditions causing paralysis (my.clevelandclinic.org).