Can anyone tell me the difference between bell's palsy and facial palsy or they are the same?

Not exactly. While both present with inability to move one side of the face, bell's palsy is a diagnosis of exclusion. Other causes of unilateral facial paralysis ( lyme disease, stroke, ear infection, ear or brain tumor, etc) need to be ruled out during the evaluation. In short, all bell's is facial palsy but not all facial palsy is bell's.