The Diagnostic and Statistical Manual of Mental Disorders (DSM) is a comprehensive classification system used by mental health professionals to diagnose mental disorders. Published by the American Psychiatric Association, the DSM provides standardized criteria and definitions for various mental health conditions, ensuring consistency in diagnosis and treatment across different practitioners. The DSM is regularly updated to reflect new research and changes in understanding of mental health. The latest edition, the DSM-5, includes a wide range of disorders, from anxiety and mood disorders to personality and psychotic disorders, helping clinicians make informed decisions about patient care.