True about lower motor neuron palsy of Vllth nerve:

Most common cause of lower motor neuron (LMN) type of facial palsy is Bell's palsy. Melkersson's syndrome consists of a triad of: (i) Facial paralysis, (ii) Swelling of lips, (iii) Fissured tongue, Paralysis may be recurrent. As patient is unable to close the eye, eye protection is required to protect cornea and conjunctiva. The prognosis in acute facial palsy can be accurately determined by serial electrical testing.The response to electrical tests have been found to be most useful in the first 5 days after the onset.