Bell's palsy causes

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Causes

Many cases are likely due to Herpes Simplex Virus (HSV) reactivation

Infectious causes

• Herpes simplex virus activation is the most likely cause of Bell's Palsy.
• Herpes Zoster may be the second most common viral infection.
• Cytomegalovirus
• Epstein Barr virus
• Adenovirus
• Rubella virus
• Mumps
• Influenza B
• Coxsackievirus
• Rickettsial infection
• Ehrlichiosis
• Borrelia burdopheri
• HIV

Non-infectious causes

• Several cases of Bell' Palsy were linked to an inactivated intranasal influenza vaccine in Switzerland
• Genetic predisposition may be likely
• Ischemia of the facial nerve
• Tumors and compression of the facial nerve
• Temporal bone fracture
• Systemic Lupus Erythematosus (SLE)
• Sarcoidosis