Bell's Palsy

Bell's Palsy

Bell's palsy is a condition that causes sudden weakness in the muscles on one side of the face. In most cases, the weakness is temporary and significantly improves over weeks. The weakness makes half of the face appear to droop. Smiles are one-sided, and the eye on the affected side resists closing..

What are the main causes of Bell's palsy?

The cause of Bell's palsy is unknown. Swelling and inflammation of the cranial nerve VII is seen in individuals with Bell's palsy. Most scientists believe that reactivation of an existing (dormant) viral infection may cause the disorder.