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Facial paralysis is a loss of facial movement due to nerve damage. Your facial muscles may appear to droop or become weak. It can happen on one or both sides of the face. Common causes of facial paralysis include:. Depending on the cause, the paralysis might last for a short or extended period of time. This condition causes inflammation of the facial nerve, which commonly causes the muscles on one side of the face to droop. It may be related to a viral infection of the facial nerve.
Facial nerve 7th cranial nerve palsy is often idiopathic formerly called Bell palsy. Idiopathic facial nerve palsy is sudden, unilateral peripheral facial nerve palsy. Symptoms of facial nerve palsy are hemifacial paresis of the upper and lower face.
The symptoms of Bell's palsy include sudden weakness in your facial muscles. In most cases, the weakness is temporary and significantly improves over weeks. The weakness makes half of your face appear to droop. Your smile is one-sided, and your eye on that side resists closing.