NAMI HelpLine

Most people may experience one or more symptoms shortly after a traumatic event, but PTSD is diagnosed only when all four types of symptoms — re-experiencing the event, avoidance of reminders related to the trauma, negative changes in mood and cognition, and hyperarousal — persist for at least one month and cause significant distress or disruption in daily life.

Symptoms must be severe enough to significantly impair daily functioning, such as work, relationships, or personal well-being. Additionally, the symptoms must not be attributable to other illnesses, medications, or substance use. PTSD often coexists with other mental health conditions such as depression, anxiety, or substance use disorders.

Screening and Diagnosis Tools

To assess the possibility of PTSD, mental health professionals typically use a combination of interviews and standardized questionnaires. Common screening and diagnostic tools include:

  • Clinician-Administered PTSD Scale (CAPS): A structured interview to assess the presence and severity of PTSD symptoms
  • PTSD Checklist for DSM-5 (PCL-5): A self-report questionnaire that screens for PTSD symptoms and tracks their severity
  • Impact of Event Scale-Revised (IES-R): A tool to assess how recent traumatic events have affected an individual
  • Trauma Screening Questionnaire (TSQ): A brief screening tool for identifying individuals who may meet the PTSD criteria

While these screening tools are not diagnostic by themselves, they provide a helpful starting point for individuals to discuss their symptoms with a healthcare provider. If PTSD is suspected, a thorough evaluation is essential for an accurate diagnosis and the development of an appropriate treatment plan. Early intervention is crucial for managing symptoms and improving mental health.

Both the National Center for PTSD and Mental Health America offer free online screening tools, which can help individuals assess whether they may be experiencing PTSD and if professional help is needed.

Reviewed and updated May 2025

NAMI HelpLine is available M-F, 10 a.m. – 10 p.m. ET. Call 800-950-6264,
text “NAMI” to 62640, or email. In a crisis, call or text 988 (24/7).