Idiopathic facial nerve palsy

Idiopathic facial nerve palsy, namely facial neuritis, also known as Bell palsy, refers to peripheral facial palsy caused by an acute non-specific inflammation of the intratemporal segment of the facial nerve. Facial neuritis mainly includes two types: Bell palsy and geniculate ganglion syndrome (Ramsay Hunt syndrome). The etiology of Bell palsy is not completely clear, but it tends to be considered as caused by a neurotropic virus. Ramsay Hunt syndrome is caused by the varicella-zoster virus.