<prompt> Most common LMN cause of Facial nerve palsy is?TraumaBells palsyInfectionsVascular causes  <response>: one of the most common cause of facial weakness is bells palsy ,a lower motor neuron lesion of the 7th facialnerve ,effecting all ages and both sexes here the lesion is within the facial canal . Ref Harrison20th editionpg 1082-1083 