Figure 1. Chronological order of physical changes to facial expressions in progressive Bell's palsy.

(A) Normal facial expressions before Bell’s palsy demonstrating baseline facial expressions. (B) The first day of symptoms demonstrating diminished ability to smile (first 24 hours). (C) The second day of symptoms demonstrating complete loss of unilateral facial expression (first 48 hours). (D) One month since initial symptoms demonstrating continued complete unilateral facial paralysis.