Psychoanalysis was a method of treating patients with mental illnesses, created by . he believed that human behavior was and that us to understand our unconscious thoughts.

The Psychoanalytic Theory was first voiced by Sigmund Freud in Vienna in the late 1890s. 

He believed that the conscious and unconscious minds were deeply interconnected, and that by voicing thoughts, repressed memories would come to light.
He believed this technique could help cure people with psychotic or hysterical symptoms.