Bell’s Palsy is an acute, idiopathic facial nerve(cranial nerve VII) paralysis that results in weakness or complete loss of muscle function on one side of the face.<\/p>\n
In Ayurveda, Bell’s Palsy is correlated with Arditha Vata, a disorder caused by an imbalance of Vata dosha affecting facial nerves and muscles. It is classified under Vata Vyadhi(neurological disorders) and primarily affects one side of the face due to nerve inflammation and muscular weakness.<\/p><\/blockquote>\n
CAUSES:<\/span><\/h1>\n
1.Viral infections(Most common cause):<\/span><\/h5>\n
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- Herpes simplex virus: The most prevalent cause of cold sores is the herpes simplex virus (HSV-1).<\/span><\/li>\n
- VZV(Varicella Zoster Virus): The virus that causes shingles and chickenpox.<\/span><\/li>\n
- EBV(Epstein-Barr Virus): The Epstein-Barr virus is the cause of mononucleosis.<\/span><\/li>\n
- Cytomegalovirus (CMV): May become dormant and reawaken in cases where immunity is compromised.<\/span><\/li>\n
- Influenza virus: can cause immunological reactions that damage nerves.<\/span><\/li>\n
- Adenoviruses: Linked to illnesses of the respiratory system.<\/span><\/li>\n<\/ul>\n
2. Autoimmune Reactions:<\/span><\/h5>\n
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- The <\/span>immune system of the body<\/span> unintentionally targets the facial <\/span>nerve’s<\/span> myelin sheath, causing inflammation and temporary paralysis.<\/span><\/li>\n<\/ul>\n
3. Ischaemic or Vascular Factors:<\/span><\/h5>\n
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- Nerve injury and dysfunction can result from ischemia, or a decreased blood flow, to the facial nerve caused by microvascular disease (such as diabetes or hypertension).<\/span><\/li>\n<\/ul>\n
4. Cold exposure and climate factors:<\/span><\/h5>\n
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- Sudden exposure to cold wind or air conditioning has been linked to <\/span>Bell\u2019s<\/span> Palsy, in some cases, possibly due to nerve irritation or vasospasm reducing blood flow.<\/span><\/li>\n<\/ul>\n
5. Stress and weakened Immune system:<\/span><\/h5>\n
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- Chronic illness, sleep deprivation, and emotional or physical stress can all impair immunity and raise the risk of viral reactivation.<\/span><\/li>\n<\/ul>\n
6. Diabetes and metabolic disorders:<\/span><\/h5>\n
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- Long-term high blood sugar levels put those with diabetes mellitus at greater risk for nerve injury.<\/span><\/li>\n<\/ul>\n
7. Pregnancy:<\/span><\/h5>\n
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- The risk <\/span>is raised<\/span> during the third trimester due to hormonal changes and increased fluid retention that might strain the facial nerve.<\/span><\/li>\n<\/ul>\n
8. Ear and Upper Respiratory Tract infections:<\/span><\/h5>\n
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- The facial nerve may <\/span>be impacted<\/span> by local inflammation brought on by sinus infections or middle ear infections (otitis media).<\/span><\/li>\n<\/ul>\n
9. Trauma and surgery:<\/span><\/h5>\n
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- The facial nerve may be harmed or compressed by head trauma, dental procedures, or facial surgery, particularly in the area of the parotid gland.<\/span><\/li>\n<\/ul>\n
10. Post Vaccine or Post Infectious Reaction:<\/span><\/h5>\n
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- After healing from diseases like Lyme disease or tuberculosis, some people get <\/span>Bell’s<\/span> Palsy.<\/span><\/li>\n
- Although the risk is low, rare incidences of <\/span>Bell’s<\/span> Palsy have <\/span>been documented<\/span> following specific Immunisations (such as the COVID-19 and Influenza vaccines).<\/span><\/li>\n<\/ul>\n
SYMPTOMS:<\/span><\/h1>\n
1.Facial Weakness or Paralysis(Hallmark Symptom):<\/span><\/h5>\n
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- One side of the face may suddenly become weak or paralyzed.<\/span><\/li>\n
- Not being able to close the afflicted eye.<\/span><\/li>\n
- Mouth drooping, which makes it challenging to frown or smile.<\/span><\/li>\n
- Inability to hold air in the mouth or blow out the cheeks.<\/span><\/li>\n<\/ul>\n
2. Eye problems:<\/span><\/h5>\n
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- Incapacity to blink, which causes dryness or excessive crying (epiphora).<\/span><\/li>\n
- Elevated light sensitivity (photophobia) in the afflicted eye.<\/span><\/li>\n
- Lagophthalmos, or difficulty closing the eye entirely, raises the risk of corneal ulcers or eye infections.<\/span><\/li>\n<\/ul>\n
3. Changes in Taste or Salivation:<\/span><\/h5>\n
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- Loss or diminished taste perception, notably on the affected side of the tongue’s front two-thirds.<\/span><\/li>\n
- A change in saliva production that causes dry mouth or drooling.<\/span><\/li>\n<\/ul>\n
4. Hearing issues:<\/span><\/h5>\n
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- Pain or discomfort behind or around the ear, frequently before the onset of facial paralysis.<\/span><\/li>\n
- Hyperacusis, or increased sensitivity to sound, in the afflicted ear.<\/span><\/li>\n
- Some people have mild hearing loss.<\/span><\/li>\n<\/ul>\n
5. Speech and eating difficulties:<\/span><\/h5>\n
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- Slurred speech as a result of improper lip movement.<\/span><\/li>\n
- Difficulty chewing, which causes food to become lodged between teeth and cheek.<\/span><\/li>\n
- Improper drinking habits, result in liquid dripping from the mouth.<\/span><\/li>\n<\/ul>\n
6. Headache and general Discomfort:<\/span><\/h5>\n
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- Headache on the afflicted side that is mild to moderate.<\/span><\/li>\n
- A sensation of numbness or heaviness in the face.<\/span><\/li>\n<\/ul>\n
7. Psychological and Social Effects:<\/span><\/h5>\n
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- Depression or anxiety brought on by changes in facial features.<\/span><\/li>\n
- Social embarrassment brought on by facial symmetry.<\/span><\/li>\n<\/ul>\n
CLASSIFICATION OF BELL\u2019S PALSY:<\/span><\/h1>\n
The classification <\/span>is based<\/span> on severity, etiology, and electrophysiological findings.<\/span><\/p>\n
1.Classification based on Severity(House-Brackmann Grading System):<\/span><\/h4>\n
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- The House-Brackmann Grading System is the most widely used method for assessing the severity of Facial Nerve Dysfunction.<\/span><\/li>\n<\/ul>\n
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\n \n GRADE<\/span><\/h4>\n<\/td>\n
\n CLINICAL FEATURES<\/span><\/h4>\n<\/td>\n<\/tr>\n
\n I(Normal)<\/span><\/td>\n \n \n
- Normal facial function in every part.<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
\n II(Mild Dysfunction)<\/span><\/td>\n \n \n
- Mild weakness;<\/span><\/li>\n
- Normal symmetry at rest.<\/span><\/li>\n
- Slight asymmetry with movement.<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
\n III(Moderate Dysfunction)<\/span><\/td>\n \n \n
- Asymmetry at rest;<\/span><\/li>\n
- incomplete eye closure;<\/span><\/li>\n
- Weakness with moderate synkinesis(involuntary movement).<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
\n IV(Moderately severe Dysfunction)<\/span><\/td>\n \n \n
- Obvious facial asymmetry.<\/span><\/li>\n
- Eye closure inability completely.<\/span><\/li>\n
- Severe synkinesis or hemifacial spasm.<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
\n V(Severe Dysfunction)<\/span><\/td>\n \n \n
- Minimal facial movement.<\/span><\/li>\n
- Incomplete closure of the eye.<\/span><\/li>\n
- Severe facial asymmetry.<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
\n VI(Total Paralysis)<\/span><\/td>\n \n \n
- No movement; complete facial paralysis.<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
2. Classification based Electrophysiological Findings:<\/span><\/h4>\n
Electromyography(EMG)and nerve conduction studies help further classification:<\/span><\/p>\n
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- Mild neuropraxia: Characterized by a transient conduction block without any deterioration.<\/span><\/li>\n
- Axonotmesis (Moderate): Slow healing; partial axon injury.<\/span><\/li>\n
- Severe neurotmesis: total degeneration of the nerves; poor rehabilitation.<\/span><\/li>\n<\/ul>\n
3. Classification based on Etiology:<\/span><\/h4>\n
Despite being idiopathic, Bell’s Palsy can <\/span>be categorized<\/span> according to possible underlying causes:<\/span><\/p>\n
I. Idiopathic Bell’s Palsy, which makes up around 70% of cases.<\/span><\/p>\n
II.Infectious cases:<\/span><\/p>\n
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- Bacterial (Mycobacterium leprae, Lyme disease) and viral (Herpes simplex virus, varicella-zoster, and cytomegalovirus).<\/span><\/li>\n<\/ul>\n
III.Autoimmune or inflammatory causes:\u00a0<\/span><\/h5>\n
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- Guillain-Barre syndrome.<\/span><\/li>\n
- Multiple sclerosis.<\/span><\/li>\n
- Sarcoidosis.<\/span><\/li>\n<\/ul>\n
IV.Neoplastic Causes:\u00a0<\/span><\/h5>\n
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- Schwannoma and parotid tumors compress the facial nerve.<\/span><\/li>\n<\/ul>\n
V.Temporal bone fractures: <\/span><\/h5>\n
Bell’s Palsy can occur as a traumatic condition ( Iatrogenic injury) when surgery <\/span>is done<\/span>.<\/span><\/p>\n
VI.Vascular Causes:<\/span><\/h5>\n
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