A method of treating depression includes identifying a subject with a pain syndrome for increased responsiveness to the treatment of pain associated with the pain syndrome with botulinum toxin and locally administering a botulinum toxin subcutaneously to a face of the subject, thereby treating said pain. Identification of the pain is made prior to administering botulinum toxin for the treatment of said pain. The subject has a pain syndrome and a condition selected from the group consisting of a depressive disorder, an anxiety disorder and a sleep disorder.
