Facial paralysis is the loss of facial muscle movement due to a weakened or damaged facial nerve, usually occurring on one side of a patient’s face. Causes of facial paralysis or facial weakness include trauma to the face or skull, or a tumor in the head or neck, among other causes. “Chronic” facial paralysis refers to long-standing weakness or immobility of the muscles of the face (for example, an inability to smile). In general, facial paralysis is considered “chronic” if it has lasted for longer than one year since initial symptom onset.
What are the signs and symptoms of chronic facial paralysis?
- Loss of facial muscle movement on one or both sides of the face for a year or longer
- Inability to smile