A psychological disorder, also known as a mental disorder, is a condition that affects a person's thinking, feeling, behavior, or mood. These disorders can disrupt daily functioning and may lead to distress in social, work, or other important areas of life. Common examples include depression, anxiety disorders, and bipolar disorder. Psychological disorders are typically diagnosed by mental health professionals using specific criteria outlined in manuals like the Diagnostic and Statistical Manual of Mental Disorders (DSM). Treatment options often include therapy, medication, or a combination of both, aimed at helping individuals manage their symptoms and improve their quality of life.