Complex post-traumatic stress disorder (CPTSD) and post-traumatic stress disorder (PTSD) are both related to traumatic events, but they are not the same, Recognizing the difference is important, as it can guide treatmente and ensure the most effective solutions. This article will explore the symptoms, causes, diagnosis, and treatment options for each condition, providing insight into these dirsorders.

What is Post-Traumatic Stress Disorder (PTSD)?

Military vets are often impacted by PTSD

Post-traumatic stress disorder develops after exposure to a single or a series of traumatic events, such as:

  • Natural disaster
  • A serious injury
  • An episode of sexual assault

Common symptoms include:

  • Intrusive memories, nightmares, and flashbacks
  • Avoidance of people, places, and things that remind the individual of traumatic events
  • Hypervigilance, hyperarousal, and elevated startle response
  • Emotional dysregulation

These symptoms can last well after well after the traumatic event occurred, leading to prolonged mental health issues.

What is Complex Post-Traumatic Stress Disorder (CPTSD)?

Childhood trauma is often connected to CPTSD

Complex PTSD arises from prolonged or repeated trauma, such as:

  • Childhood sexual abuse and physical abuse
  • Domestic violence
  • Captivity

A 2025 PubMed study of global CPTSD prevalence showed an affected population of 6.2%, 40% of those individuals stated CPTSD was connected to domestic and sexual abuse, while 36.4% were military samples.

CPTSD and PTSD symptoms are similar. However, with CPTSD, you may experience additional symtoms, such as:

  • Persistent feelings of worthlessness and shame
  • Difficulty maintaining meaningful relationships
  • Issues with emotional regulation
  • A persistent state of threat or hypervigilance

Diagnostic Criteria: DSM-5 vs. ICD-11 Perspectives

PTSD and CPTSD do not have separate diagnoses in the Diagnostic and Statical Manual Fifth Edition (DSM-5), the authoritative published by the American Psychiatric Association, used by clinicians to diagnose mental health conditions. However, it includes some updated criteria recognizing overlapping symptoms like negative mood, self-destructive behavior, and self-blame. It also lists a dissociative subtype of PTSD for patients exhibiting complex trauma symptoms.

Meanwhile, the International Classification of Diseases, 11th Revision, ICD-11, the World Health Organization’s (WHO) global standard for diagnostic health information, sees PTSD and CPTD as distinct diagnostic conditions. It recognizes common symptoms, but notes that CPTSD includes disturbance in self-regulation that can lead to a negative self-concept and relational difficulties. The ICD-11 identifies the core symptom structure as follows:

  • PTSD (6B40): Comprises three core clusters: re-experiencing (flashbacks), avoidance of trauma reminders, and a persistent sense of current threat.
  • CPTSD (6B41): Compromises the three core PTSD clusters, plus DSO clusters: Emotional regulation difficulties, negative self-concept, and diffculties maintaining relationships.

A 2019 study reveals 3.4% of adults met the ICD-11 criteria for PTSD, while 3.6% met the criteria for CPTSD, suggesting CPTSD may be slightly more common.

Overlap and Differences Between CPTSD and Borderline Personality Disorder

Complex PTSD may present similary to borderline personality disorder, due to the following shared symptoms:

  • Emotional Dysregulation: With both conditions, individuals have difficulty controlling emotions and experience hypervigilance, disassociation, shame, emptiness, and identify disturbance.
  • Interpersonal Issues: While both conditions can interfere with relationships, people with PTSD tend to be more emotionally numb, while those with BPD frantically avoid abandonment.

The biggest difference between BPD and CPTSD is that BPD is not trauma-related and therefore is not triggered by or connected to traumatic events. Therefore, trauma-informed care is recommended for CPTSD, while medications and other therapies  are often integrated in BDP care.

Effective Treatments for PTSD and CPTSD

Therapy should be customized, addressing the difference between CPTSD and PTSD

Posttraumatic stress disorder and complex PTSD have similar treatment approaches with some key differences. Both involve the following techniques.

  • Stabilization: Treatment for both conditions begins with stabilization, safety planning, skill building, and psychoeducation to address disassociation.
  • Trauma Processing: Prolonged exposure therapy is typically delivered through methodologies such as cognitive processing therapy (CPT) and eye movement desensitization and reprocessing (EMDR). Individuals relive traumatic events in a safe space, so they become less overwhelming.

However, CPTSD has an additional step- integration and reconnection. This is where individuals rebuild relationships,  identity, and meaning as they move past trauma.

PTSD vs. CPTSD Side-By-Side Comparison Chart

PTSD CPTSD
Cause Single or defined traumatic event Prolonged or repeated trauma
Examples Natural disaster, assault, serious injury Childhood abuse, domestic violence, captivity
Core Symptoms Flashbacks, avoidance, hypervigilance, emotional dysregulation All PTSD symptoms plus shame, worthlessness, relationship difficulties, and identity disturbance
DSM-5 Diagnosis Yes No (captured partially through updated PTSD criteria
IDC-11 Diagnosis Yes (6B40) Yes (6B41)
Treatment Stabilization, trauma processing Stabilization, trauma processing, plus integration and reconnection phase
Overlap with BPD Some shared symptoms Greater overlap due to relational and identity disruption

BNI Clinics Provides Assistance with Mental Health Conditions

At BNI, we understand the importance of seeing every person and every condition as different. This insight guides us to implement customized approaches tailored to our clients’ individual needs. We utilize proven therapies that provide long-lasting results, helping teens achieve a brighter future.

Contact us to learn more about what we offer.

FAQs

Not really. While CPTSD symptoms encompass PTSD symptoms, it’s more of an expansion of the condition and requires additional treatment.

Trauma processing refers to approaches like cognitive processing therapy and EMDR, allowing clients to revisit traumatic events in a structured, safe environment to reduce their emotional intensity.

Chronic trauma, especially when present during childhood, can disrupt relationships, create identity issues, and cause negative emotional patterns. Addressing those issues goes beyond symptom reduction, requiring people to rebuild how they relate to themselves and others.

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    Dr. Aram Keshishyan

    Dr. Aram Keshishyan, PsyD.

    Aram Keshishyan, PsyD. is a bilingual, Armenian-speaking, licensed clinical-forensic psychologist who has been practicing since 2013. Dr. Keshishyan emigrated to the United States at the age of 1 and grew up in the highly diverse Los Angeles County area. He obtained a Bachelor of Arts degree in Psychology from the University of California, Los Angeles, and Master of Arts and Doctorate of Psychology degrees in Clinical-Forensic Psychology from Alliant International University, Alhambra.

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    Arastou Aminzadeh, MD

    Dr. Aminzadeh co-founded BNI to provide patients with exceptional and complete care that goes beyond the regular standards. Each individual is unique and based on each person's genetic makeup, some have a more painful response to challenges that arise on their journey and need assistance to get back on track.

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