Facial nerve palsy is a dysfunction of cranial nerve VII (the facial nerve) that results in inability to control facial muscles on the affected side with weakness of the muscles of facial expression and eye closure. This can either be present in unilateral or bilateral form. The phenotype is HP_0010628 (Facial palsy). Also known as: Bell's palsy, Cranial nerve VII palsy, Facial nerve palsy, Facial nerve paralysis, Facial palsy, unilateral or bilateral, Seventh cranial nerve palsy, VII th cranial nerve palsy.