Bell’s Palsy: Facial Paralysis, Causes, Symptoms, Care

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People with Bell’s palsy face more than physical symptoms. Facial changes show up where everyone can see them, and many people misunderstand the condition. That adds stress on top of the medical side.

What is Bell’s palsy

Bell’s palsy causes temporary weakness or paralysis of the facial muscles when the facial nerve becomes inflamed, swollen, or compressed. One side of the face may droop, and you can have trouble smiling or closing your eye on that side. Most cases improve within weeks.

The condition can affect any age, but it’s more common between 15 and 60 years. Pregnant women and people with diabetes or recent upper respiratory infections have higher risk. Bell’s palsy affects men and women equally.

Recovery often starts within 2 weeks and can take 3 to 6 months. In rare cases, some symptoms persist. The condition is named after Charles Bell, who first described it.

What causes Bell’s palsy?

Bell’s palsy happens when the seventh cranial nerve swells or is compressed. The exact trigger is unknown, but many researchers link it to viral infections. Commonly associated viruses and infections include:

• herpes simplex (cold sores)
• HIV
• sarcoidosis
• herpes zoster (chickenpox and shingles)
• Epstein-Barr virus (mono)
• Lyme disease

Other factors sometimes linked to Bell’s palsy include:

• Diabetes
• High blood pressure
• Injury
• Toxins
• Guillain-Barré syndrome
• Myasthenia gravis
• Multiple sclerosis

Symptoms to watch for

Symptoms can appear suddenly, often after a cold or ear infection. Common signs include:

• one-sided facial droop and difficulty closing that eye
• drooling and trouble eating or drinking
• loss of facial expressions, muscle twitches
• dry eye or dry mouth
• headache and sensitivity to sound
• irritation of the affected eye

Call your doctor right away if you notice sudden facial weakness. Other conditions, such as stroke or tumor, can produce similar symptoms and need prompt evaluation.

Key points about Bell’s palsy

• Bell’s palsy causes sudden facial muscle weakness or paralysis, usually on one side.
• Its exact cause is unknown, but inflammation and viral triggers are suspected.
• Symptoms often worsen for a few days and then start improving within about 2 weeks.
• Full recovery usually takes 3 to 6 months, but some people have longer-lasting effects.
• Proper eye care and medical treatment matter to protect the eye and aid recovery.

How doctors diagnose it

Diagnosis starts with a physical exam and history. Your clinician will assess facial movement and ask when symptoms began. Blood tests can check for viral or bacterial infections.

If the cause is unclear, tests that may help include:

• Electromyography (EMG) to confirm nerve damage and gauge its severity.
• Imaging such as MRI or CT to rule out tumors or structural causes.