Post-Traumatic Stress Disorder

Post-traumatic stress disorder (PTSD) is a mental disorder that can develop after exposure to an extremely threatening or horrifying event, characterised by persistent re-experiencing of the trauma, deliberate avoidance of reminders, and a sense of current threat marked by heightened arousal. This entry frames PTSD within mental health nursing and the recovery process; the broader clinical-psychiatric treatment of PTSD is covered by the psychiatry node.

Definition

PTSD is a disorder that may arise after exposure to an event or situation of an exceptionally threatening or catastrophic nature, defined by three core elements: re-experiencing the event in the present (intrusive memories, flashbacks, nightmares), avoidance of trauma reminders, and a persistent sense of heightened current threat.

Scope

The entry covers the core clinical features of PTSD, how it is recognised and screened, and its place within the trauma-and-recovery pathway in nursing care. It situates PTSD as one — not the only — outcome of trauma exposure. It is a reference and educational overview; it does not provide diagnostic criteria checklists for self-diagnosis, dosing, or individualised treatment advice.

Core questions

• What distinguishes PTSD from a normal, time-limited reaction to a traumatic event?
• What are the recognised core symptom clusters of PTSD?
• How is PTSD identified and screened in clinical settings?
• How does PTSD relate to complex presentations following prolonged or repeated trauma?

Key concepts

• Re-experiencing (intrusions, flashbacks, nightmares)
• Avoidance of trauma reminders
• Sense of current threat / hyperarousal
• Negative alterations in cognition and mood
• Complex PTSD
• Screening instruments (e.g., PCL-5)
• Delayed onset

Mechanisms

PTSD is understood as a failure of the normal recovery process after trauma, in which the memory of the event remains poorly contextualised in time and is repeatedly reactivated as if the threat were present. Yehuda and colleagues (2015) describe contributing neurobiological systems — including altered fear conditioning and extinction, and dysregulation of stress-hormone and arousal circuits — alongside cognitive and social factors. Shalev and colleagues (2017) summarise how acute stress reactions in most people resolve, while in a subset symptoms persist and consolidate into the disorder. Herman (1992) argued that prolonged, repeated interpersonal trauma can produce a broader 'complex' picture involving disturbances of affect regulation, self-concept, and relationships, a construct now reflected in complex PTSD.

Clinical relevance

Recognising PTSD matters in nursing because trauma-exposed people are common across settings and the disorder is treatable, yet it is often missed when presentations are dominated by other complaints. Validated screening tools such as the PCL-5 (Blevins et al., 2015) support recognition. This entry explains the concept and how it is identified; it is not a diagnostic instrument and gives no individualised treatment direction — assessment and management require qualified clinical evaluation.

Epidemiology

Although exposure to potentially traumatic events is common over a lifetime, only a minority of those exposed develop PTSD, and rates vary by trauma type, being higher after interpersonal violence than after many other events. Onset is usually within months of the trauma but can be delayed, and course ranges from spontaneous remission to a chronic, relapsing condition (Yehuda et al., 2015; Shalev et al., 2017).

History

PTSD entered formal nosology in 1980, consolidating earlier descriptions of combat stress, traumatic neurosis, and the sequelae of disasters and interpersonal violence. Subsequent revisions refined its symptom structure, and the ICD-11 introduced a tighter definition alongside a separate diagnosis of complex PTSD, building on Herman's 1992 conceptualisation of disorders following prolonged trauma.

Debates

Is complex PTSD distinct from PTSD?

ICD-11 recognises complex PTSD as a separate diagnosis with additional disturbances in self-organisation, while some argue the boundary with PTSD and with other disorders remains uncertain and that the constructs overlap substantially.

Key figures

• Rachel Yehuda
• Arieh Shalev
• Judith Herman

Seminal works

• yehuda-2015
• shalev-2017
• herman-1992

Frequently asked questions

How is PTSD different from a normal reaction to a frightening event?

Acute distress, intrusive memories, and heightened arousal are common in the days and weeks after a traumatic event and usually subside. PTSD is diagnosed when these features persist, cause significant impairment, and include re-experiencing the event as if it were happening in the present together with avoidance and a continuing sense of threat.

What is complex PTSD?

Complex PTSD, recognised in ICD-11, includes the core features of PTSD plus persistent disturbances in emotion regulation, self-concept, and relationships, typically following prolonged or repeated trauma from which escape was difficult. Diagnosis requires qualified clinical assessment.