ABSTRACT
The face is the window to the mind and facial expression reflects the emotions and well-being of the individual. Hence, acute facial weakness is probably the most visible and distressing nerve palsy in the body. A systematic approach to the correct diagnosis for facial weakness and timely, appropriate management is vital in providing the best chance for its complete recovery. The facial nerve comprises both upper and lower motor neurons (UMN and LMN). UMN weakness occurs due to lesions involving the motor cortex or internal capsule, while LMN weakness is due to affliction of the nerve in its intracranial, intratemporal or extracranial segments. Described by Sir Charles Bell in 1821, this is an idiopathic unilateral peripheral facial nerve palsy with some evidence to support a viral aetiology. Bell's palsy normally presents with sudden onset of unilateral lower motor nerve facial palsy over a course of 24–48 hours. It is frequently preceded by periauricular paresthesia or otalgia.
