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This Wikipedia page provides a comprehensive overview of the disorder, including its causes, symptoms, diagnosis, and treatment options. The page starts by discussing the definition and classification of PTSD, as well as its historical background. It then delves into the possible causes of the disorder, such as traumatic events like war, accidents, or sexual assault. The role of genetics, brain chemistry, and personality traits in making some individuals more susceptible to developing PTSD is also explored. Next, the symptoms of PTSD are thoroughly explained. These include intrusive thoughts or memories of the traumatic event, nightmares, flashbacks, and severe anxiety or distress when exposed to triggers associated with the trauma. The page also discusses other common symptoms, such as avoidance of reminders, changes in mood and cognition, and hyperarousal. Diagnosis and assessment tools for PTSD are then introduced. The DSM-5 criteria, commonly used by mental health professionals, are listed along with various self-report questionnaires and clinical interviews. Additionally, differential diagnoses are presented to distinguish PTSD from other disorders with similar symptoms. The section on treatment options discusses evidence-based therapies for PTSD. These include trauma-focused psychotherapies like cognitive-behavioral therapy (CBT), eye movement desensitization and reprocessing (EMDR), and prolonged exposure therapy (PE). Medications such as selective serotonin reuptake inhibitors (SSRIs) and selective norepinephrine reuptake inhibitors (SNRIs) are also mentioned. Alternative and complementary treatments are briefly discussed as well. The page ends with a section on prognosis and epidemiology, covering the long-term outlook for individuals with PTSD and the prevalence of the disorder in different populations. Risk factors and potential complications of PTSD are also highlighted. Overall, the Wikipedia page on posttraumatic stress disorder provides a comprehensive and informative resource for readers seeking knowledge about this complex mental health condition.