What causes facial neuritis?

Written by Tang Bo
Neurology
Updated on September 02, 2024
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Facial neuritis, also known as idiopathic facial nerve paralysis or Bell's palsy, is caused by nonspecific inflammation of the facial nerve inside the cranial foramen, leading to peripheral facial paralysis. The exact cause is currently unknown, but it is thought to possibly be related to viral infections of the optic nerve, as well as potentially due to exposure to cold or upper respiratory tract infections. The mechanism of onset involves the bony facial nerve canal, which can only accommodate the facial nerve. However, if the facial nerve becomes ischemic and swollen, it will inevitably lead to nerve compression. Viral infections can lead to local autoimmune responses in the nerves and spasms of the nutrient vessels, resulting in ischemic swelling and facial nerve paralysis.

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Written by Tang Bo
Neurology
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Is facial neuritis the same as facial paralysis?

Facial neuritis can lead to facial paralysis, but facial paralysis can be divided into central facial paralysis and peripheral facial paralysis. Generally, facial paralysis caused by facial neuritis is peripheral facial paralysis. This means that there might be incomplete closure of the eyelids and deviation of the mouth corners. If central facial paralysis is considered, it generally does not lead to incomplete closure of the eyelids. Central facial paralysis is mainly caused by cerebrovascular diseases or other diseases of the brain or brainstem, whereas facial neuritis is due to damage to the facial nerve.

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Written by Zhang Hui
Neurology
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Should one avoid certain foods with facial neuritis?

Patients with facial neuritis should still avoid certain foods during the acute phase. They should avoid alcohol, spicy and irritating foods, and preferably seafood as well. Consuming these foods may lead to immune dysfunction, which is detrimental to nerve recovery. Patients with facial neuritis are advised to eat plenty of fresh fruits and vegetables, which contain high levels of Vitamin C to enhance the body's resistance. They can also consume foods rich in B vitamins, such as whole grains, lean meats, and animal liver. For medication treatment, it is essential to treat promptly. If there are no contraindications, corticosteroids may be used under a doctor’s advice. (Please follow medical advice regarding medication.)

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Written by Yuan Jun Li
Neurology
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Does facial neuritis cause fever?

Bell's palsy can cause fever, usually a low-grade fever. When the body temperature is between 37°C and 38°C, it is generally referred to as low-grade fever. The primary cause of Bell's palsy is viral infection. Patients may also exhibit symptoms such as eye fissures, paralysis of the facial expression muscles of the upper and lower face, disappearance of forehead creases, enlargement of the eye fissures, incomplete eyelid closure, showing white sclera when the eyes are closed, shallowing of the nasolabial folds, deviation of the mouth corners, air leakage when whistling, air escaping when puffing cheeks, loss or reduction of taste in the anterior two-thirds of the tongue, and difficulty in retaining food on the affected side when eating. Patients are prone to developing oral inflammation and conjunctivitis. Early and proper treatment after the onset is crucial, and most patients can achieve clinical cure after treatment.

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Written by Zhang Hui
Neurology
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Does facial neuritis cause the tongue to be crooked?

Patients with facial neuritis should not exhibit a crooked tongue, as the tongue is governed by the hypoglossal nerve, which is not directly related to facial neuritis. If a patient does have a deviated tongue when sticking it out, it’s crucial to consult a neurologist, undergo a cranial MRI to rule out any new cerebral infarction. Patients with facial neuritis mainly exhibit symptoms of peripheral facial palsy, such as deviation of the mouth, drooping of the mouth corners, drooling, and inability to blow cheeks or whistle. They may also experience a reduction or disappearance of forehead wrinkles, and may find it difficult to open or close their eyes. Prompt intervention and treatment are necessary.

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Written by Feng Ying Shuai
Traditional Chinese Medicine
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How long does facial neuritis require acupuncture treatment?

Facial nerve neuritis, acupuncture is a very important rehabilitation method for it. The duration of acupuncture should be analyzed based on different individuals. Acupuncture mainly helps with the recovery from facial nerve neuritis. The duration of acupuncture is primarily to restore the movement and sensation of the facial expression muscles on the affected side to be almost the same as the healthy side. At that point, acupuncture can be stopped. Based on clinical situations, most people might need about 2-3 courses of acupuncture to see improvement. However, there are a very small number of people who might need a longer duration of acupuncture, such as 4-5 courses, and some even longer. The duration of acupuncture depends on the location of the nerve damage. If the damage is close to the inside of the skull, the duration might be longer, whereas if it's closer to the outside, it might be shorter. Additionally, the constitution of the patient also plays a role; patients with a stronger constitution might require less time, while those who are weaker, older, or have complications such as diabetes might need a longer duration of acupuncture.