We encountered a patient with bilateral simultaneous facial nerve palsy who was suspected to have idiopathic cranial polyneuropathy, but no change in the cerebrospinal fluid or evidence of infectious disease was detected. The patient displayed symptoms of palsy, but they were related only to the facial nerve. Consequently, he was diagnosed with Bell's palsy.
There are many different potential diagnoses in cases of facial palsy. This report discusses various forms of Guillain-Barré syndrome and Lyme disease which tends to be overlooked as a cause of facial nerve palsy.