What is bells palsy?

Facial nerve paralys. Bell's palsy is a viral infection that causes the facial nerve to no longer function. It can lead to weakness or paralysis of one side of the face. If treated early with high-dose steroids the paralysis does not last as long and the damage is not as permanent. An evaluation is important because you have to make sure other problems are not causing the paralysis.
Bell's palsy. Acute paralysis of the 7th cranial nerve eyelid won't close and one side of face droops thought to be due to a virus infection or immune response to such. Typically, resolves completely, but Prednisone speeds the resolution.