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PsychCentral Obsessive-Compulsive Disorder Obsessive-compulsive disorder is a mental disorder whose main symptoms include obsessions and compulsions, driving the person to engage in unwanted, oftentimes distress behaviors or thoughts. It is treated through a combination of psychiatric medications and psychotherapy. Obsessive-compulsive disorder (OCD) is an anxiety disorder characterized by recurrent and disturbing thoughts (called obsessions) and/or repetitive, ritualized behaviors that the person feels driven to perform (called compulsions). Obsessions can also take the form of intrusive i...

PsychCentral Posttraumatic Stress Disorder (PTSD) What is PTSD? Post-traumatic stress disorder (PTSD) is a debilitating mental disorder that can occur when a person has either directly experienced or simply witnessed an extremely traumatic, tragic, or terrifying event. People with PTSD usually have persistent frightening thoughts and memories of their ordeal and feel emotionally numb, especially with people they were once close to. Posttraumatic stress disorder, once referred to as “shell shock” or battle fatigue, was first brought to public attention by war veterans after the Civil War i...