Facial Nerve Symptoms: Facial Weakness, Difficulty Closing the Eye & Key Signs of Inflammation

Facial nerve symptoms often appear suddenly and affect the muscles on one side of the face. As a result, a person may notice difficulty smiling, closing the eye, or moving the mouth normally. Facial muscle weakness may be accompanied by pain around the ear or jaw, changes in taste, or increased sensitivity to sounds. The severity of symptoms varies from one case to another. Facial weakness can also occur for several different reasons, and not every case of sudden facial weakness means Bell's palsy. Therefore, the patient needs prompt medical evaluation to determine the cause and rule out serious conditions.

Medical Disclaimer: This article was medically reviewed by Professor Dr. Mohamed Abdelbary, Lecturer and Consultant of Neurosurgery and Spine Surgery, to ensure the accuracy of the medical information provided.

What Are the Facial Nerve Symptoms?

The facial nerve symptoms vary depending on the degree of nerve involvement, but they usually appear on one side of the face within a short period. They may begin as mild weakness and become more noticeable over several hours or days. Some of the most common signs include:

• Drooping of the corner of the mouth on the affected side.

• Difficulty smiling or moving the facial muscles.

• Inability to close the eye completely.

• Increased tearing or dry eye.

• Drooling and difficulty keeping food or liquids inside the mouth.

• Changes in or reduced sense of taste.

• Pain around the jaw or behind the ear.

• Increased sensitivity to sounds in the ear on the affected side.

Symptoms Before Facial Nerve Palsy Develops

Some signs may appear before facial muscle weakness becomes fully established, but there are no confirmed symptoms that can reliably predict the condition before it occurs. Some patients may experience pain behind the ear or around the jaw, or unusual sensitivity to sounds on the side that will later develop weakness. Facial symptoms may then appear within a short period. In children, ear or jaw pain may occur one or two days before facial weakness. Therefore, if unusual pain is followed by a change in the movement of one side of the face, it is better to seek medical evaluation rather than wait for the symptoms to progress.

Facial Nerve Disease Symptoms and Their Effects on the Face

One of the most common facial nerve disease symptoms is weakness or paralysis of the muscles on one side of the face. The smile may become asymmetrical, or the corner of the mouth may droop on the affected side. The patient may also have difficulty closing the eyelid, which is important because incomplete eye closure can cause dryness and irritation of the eye surface. Changes in the amount of tears or saliva may also occur, along with difficulty eating or drinking, changes in taste, or increased sensitivity to sound in the affected ear. Symptoms usually develop quickly and may reach their maximum severity within approximately 48 hours.

Does the Facial Nerve Affect the Eye?

Yes, weakness of the facial nerve may make it difficult to close the eye on the affected side, increasing the risk of dry eye and irritation. Therefore, protecting the eye is an important part of managing the condition. The doctor may prescribe lubricating eye drops or eye ointment, along with protective measures during sleep when necessary. The eye should be medically evaluated if the eyelid cannot close completely, as severe untreated dryness may damage the surface of the eye.

Facial Nerve Inflammation Symptoms in Children

Bell's palsy can also affect children and adolescents, and it usually appears as rapid weakness on one side of the face. The child may have difficulty raising the eyebrow, closing the eye, smiling, or puffing out the cheek. They may also experience difficulty speaking or keeping food and liquids inside the mouth. Facial weakness may be preceded by ear or jaw pain and increased sensitivity to sounds. Although most children with Bell's palsy recover well, facial weakness in a child requires medical evaluation to determine the cause and rule out other conditions that can cause facial paralysis.

How Is Facial Nerve Palsy Diagnosed?

Bell's palsy is usually diagnosed through a clinical examination. The doctor evaluates facial muscle movement and asks the patient to raise the eyebrows, close the eyes, smile, show the teeth, and perform other facial movements. Not every patient needs imaging or laboratory tests, but the doctor may request an MRI, CT scan, or other tests if the symptoms are atypical or another potential cause of facial weakness is suspected. It is important to distinguish Bell's palsy from stroke and other causes of facial paralysis.

When Are Facial Nerve Symptoms Serious?

Although Bell's palsy is usually a temporary condition, sudden facial weakness requires prompt medical evaluation because a stroke can cause similar symptoms. Concern is greater if facial weakness is accompanied by weakness in the arm or leg, speech difficulties, difficulty walking, loss of balance, or a sudden severe headache. In these cases, emergency medical assistance should be sought, and the symptoms should not simply be assumed to be facial nerve inflammation. The patient should also see a doctor promptly if they cannot close the eye to protect the cornea from dryness and injury.

Do Facial Nerve Inflammation Symptoms Go Away?

Most cases of Bell's palsy gradually improve. Recovery may begin within weeks, while complete recovery may take several months in some cases. Mayo Clinic states that most patients experience significant improvement, and many achieve complete recovery within approximately six months, although a small percentage may continue to experience some symptoms. Recovery time varies depending on the severity of nerve weakness, how quickly treatment is started, and the patient's overall health. Therefore, recovery time should not be compared from one person to another, and medical follow-up should not be discontinued simply because improvement has begun.

How Is Facial Nerve Palsy Treated?

Treatment depends on the cause of facial weakness, the severity of the condition, and when the symptoms first appeared. In cases of Bell's palsy, the doctor may prescribe corticosteroids to help reduce nerve inflammation, and they are more beneficial when started early. Antiviral medications may be used in some severe cases alongside the primary treatment, while the eye requires special care if the eyelid cannot close. Some patients may also benefit from physical therapy and facial muscle exercises under the supervision of a specialist. Corticosteroids or antiviral medications should not be taken without a medical diagnosis and prescription.

Book an Appointment to Evaluate Facial Nerve Symptoms

If you experience facial nerve symptoms or notice sudden weakness on one side of the face, early diagnosis can help determine the cause and begin appropriate management. At Dr. Mohamed Abdelbary's Neurosurgery Center in Alexandria, cases of facial weakness and paralysis can be evaluated to determine whether the symptoms are consistent with a facial nerve disorder or require additional tests to rule out other causes. Do not wait for the symptoms to worsen, especially if you have difficulty closing the eye or experience other neurological symptoms.

Frequently Asked Questions About Facial Nerve Symptoms

What Are the First Symptoms of Facial Nerve Palsy?

Facial nerve palsy may begin with sudden weakness on one side of the face, along with difficulty smiling, closing the eye, or moving the corner of the mouth. Some people may also experience pain behind the ear or around the jaw or increased sensitivity to sound on the affected side beforehand.

Can the Facial Nerve Cause Headaches?

Headaches or pain around the jaw and behind the ear on the affected side may accompany Bell's palsy, but a headache alone does not indicate facial nerve palsy. The symptoms should be evaluated together, particularly if sudden facial weakness or drooping develops.

Can Facial Nerve Palsy Affect Children?

Yes, Bell's palsy can affect children and adolescents and may appear as sudden weakness on one side of the face with difficulty closing the eye or smiling. However, the child should undergo medical evaluation to determine the cause and rule out other causes of facial paralysis.

Can the Facial Nerve Be a Sign of a Stroke?

Sudden facial weakness may be a sign of a stroke, so the cause should not be assumed to be facial nerve palsy without medical evaluation. Facial weakness accompanied by weakness in an arm or leg, speech difficulties, or balance problems requires emergency medical care immediately.