Bell’s palsy is a condition that causes sudden weakness or paralysis of the muscles on one side of the face. It occurs when the facial nerve (seventh cranial nerve) becomes inflamed or swollen, interrupting the signals that control facial expressions.
The facial nerve is responsible for much more than smiling. It helps you blink, close your eyes, raise your eyebrows, whistle and control certain taste sensations. When the nerve is affected, these everyday functions become difficult.
Although Bell’s palsy can affect people of any age, it is more commonly seen in adults between 15 and 60 years. Most cases involve only one side of the face and develop rapidly, often over a few hours.
One of the biggest concerns is distinguishing Bell’s palsy from a stroke.
While both conditions can cause facial drooping, a stroke is usually accompanied by additional symptoms such as:
Bell’s palsy typically affects only the facial muscles. However, because the symptoms can overlap, every sudden facial weakness should be evaluated immediately by a neuro specialist.
Most patients notice symptoms suddenly. They may have gone to bed normally only to wake up unable to smile properly or find it difficult to close one eye.
Common symptoms include:
The exact cause is not always known. Most experts believe Bell’s palsy develops when a viral infection triggers inflammation of the facial nerve inside the narrow bony canal through which it travels. As the nerve swells, it becomes compressed, affecting its ability to transmit signals to the facial muscles.
Viruses that have been associated with Bell’s palsy include:
Certain pre existing medical comorbidities or conditions may increase the risk of developing Bell’s palsy, including:
Any sudden facial weakness should be assessed without delay. Do not wait to see whether the symptoms improve on their own. Seek immediate medical attention if you experience:
Early evaluation helps doctors rule out life-threatening conditions such as stroke and begin treatment quickly if Bell’s palsy is confirmed. Research shows that starting corticosteroid treatment within 72 hours offers the best chance of complete recovery. Delaying treatment may increase the risk of prolonged weakness or incomplete recovery.
There is no single test that confirms Bell’s palsy. Diagnosis is primarily based on your symptoms, medical history and a detailed neurological examination.
Your neurologist will assess:
Because several conditions can mimic Bell’s palsy, additional tests may be recommended in selected patients.
These may include:
A thorough evaluation ensures that appropriate treatment begins as early as possible.
The goal of treatment is to reduce inflammation, protect the eye, restore facial muscle function and prevent long-term complications.
Oral corticosteroids are the first-line treatment for Bell's palsy. They help reduce swelling around the facial nerve, improving its ability to recover. Treatment is most effective when started within 72 hours of symptom onset.
In selected patients, your neurologist may also prescribe antiviral medication if a viral infection is suspected. Although antivirals alone are not sufficient, they may provide additional benefit when combined with steroids in severe cases.
It is important to complete the prescribed course of medication and avoid self-medication.
One of the biggest concerns in Bell's palsy is protecting the affected eye. If the eyelid does not close completely, the surface of the eye can become dry, leading to irritation, infection or even corneal injury.
Depending on your symptoms, your doctor may recommend:
Proper eye care is an essential part of recovery.
Facial rehabilitation plays an important role, particularly for patients with moderate or severe weakness or those whose recovery is slower than expected.
Specialised physiotherapy may include:
These exercises help maintain muscle strength, improve coordination and reduce the risk of unwanted facial movements known as synkinesis, where muscles move involuntarily during facial expressions.
Patients are advised to perform only therapist-guided exercises, as incorrect techniques may delay recovery.
Surgery is rarely required for Bell's palsy. In exceptional cases where severe facial nerve damage persists despite conservative treatment, specialists may consider procedures such as facial nerve decompression or reconstructive surgery. These options are reserved for carefully selected patients after comprehensive evaluation.
The recovery journey varies from person to person depending on the severity of nerve inflammation and how quickly treatment begins.
Most patients experience gradual improvement rather than sudden recovery.
Typical recovery timeline:
Studies suggest that approximately 70–85% of people recover fully, especially when treatment begins promptly.
Some patients may continue to experience mild facial weakness, muscle tightness or involuntary facial movements. Ongoing physiotherapy and follow-up with a neurologist can help improve these symptoms.
If there is no noticeable improvement after three weeks or symptoms continue to worsen, further evaluation may be necessary to exclude other underlying neurological conditions. So if you’re a few weeks in and still not seeing improvement, flag it to your doctor rather than assuming it’s just taking longer. Not because something has necessarily gone wrong, but because your treatment plan may need adjusting.
Although Bell’s palsy itself is not life-threatening, sudden facial weakness can also indicate a stroke. Seek immediate medical evaluation so the correct diagnosis can be made without delay.
Some patients recover naturally, but starting treatment within 72 hours significantly improves the chances of complete recovery and reduces complications.
No. Bell’s palsy cannot spread from one person to another. However, certain viral infections associated with the condition may themselves be contagious.
It usually affects only one side. Bilateral Bell’s palsy is extremely rare and requires detailed medical evaluation to rule out other neurological disorders.
Stress alone is not considered a direct cause, but prolonged stress may weaken immunity, making viral infections more likely to reactivate in susceptible individuals.
Most patients begin improving within a few weeks, with complete or near-complete recovery occurring over three to six months.
CK Birla Hospital, Gurgaon offers comprehensive Bell’s palsy care with experienced neurologists, advanced diagnostic facilities, facial rehabilitation services and multidisciplinary support to help patients achieve the best possible recovery.
