by Vanessa H. Roddenberry, Ph.D.

We often picture posttraumatic stress disorder (PTSD) as the aftermath of a single, catastrophic event, such as a car accident, a violent assault, a combat deployment. Yet, clinical research increasingly recognizes a crucial distinction: trauma is not always an isolated incident. For many, it is an environment. When comparing complex PTSD vs PTSD, this distinction becomes essential.

Understanding the meaning of complex PTSD (CPTSD) requires moving beyond the idea of trauma as a discrete memory that failed to process correctly. Instead, CPTSD reflects the cumulative impact of prolonged, inescapable threat, particularly within interpersonal relationships. In these contexts, the question is not simply what happened, but how repeated exposure shaped patterns of emotion, identity, and connection over time.

CPTSD is formally recognized in the International Classification of Diseases, 11th Revision (ICD-11), defined by both core PTSD symptoms and persistent disturbances in self-organization (World Health Organization [WHO], 2019).

The Single Event vs. The Enduring Environment

A useful clinical distinction lies in the difference between acute and chronic trauma.

Acute trauma is time-limited. It overwhelms the system, but eventually ends. Chronic trauma, by contrast, unfolds within an enduring environment, often one in which escape is not possible. This lack of “escape-ability” is a defining feature.

When threat originates from caregivers, partners, or other attachment figures, the nervous system must adapt not only to danger, but to dependency on the source of that danger. These adaptations are not failures; they are survival strategies.

• PTSD is most commonly associated with single-incident trauma (e.g., accidents, combat exposure, assault).
• CPTSD develops in response to prolonged, repeated, and interpersonal trauma, such as childhood abuse, emotional neglect, coercive control, or captivity (Cloitre et al., 2013).

Over time, the nervous system does not simply encode fear—it reorganizes around it.

Diagnostic Status, Clinical Utility, and an Evolving Understanding of Trauma

CPTSD is formally recognized in the ICD-11, yet it is not currently a distinct diagnosis in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5-TR).

While CPTSD is formally recognized in the International Classification of Diseases, 11th Revision (ICD-11), it is not currently a distinct diagnosis in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). However, revisions to PTSD criteria in the DSM-5, including the addition of negative alterations in cognition and mood, reflect a growing recognition that trauma extends beyond fear-based responses to encompass enduring changes in identity, belief systems, and emotional functioning (American Psychiatric Association, 2022).

In clinical practice, however, the absence of a DSM-5-TR diagnosis does not diminish CPTSD’s usefulness. Many clinicians find the construct of complex trauma essential for accurately conceptualizing individuals whose experiences extend beyond single events or even repeated traumas, into environments where threat is not episodic, but distinguished continuous relational trauma. The CPTSD framework allows for a more precise understanding of how prolonged, interpersonal threat shapes emotional regulation, self-concept, and relational functioning over time (Cloitre et al., 2013).

In this sense, CPTSD is not merely a diagnostic label; it is a clinical lens. It helps organize patterns that might otherwise appear fragmented or misattributed, guiding treatment toward the underlying mechanisms of adaptation rather than surface-level symptom clusters.

Beyond Fear: Disturbances of Self-Organization

While PTSD is characterized by re-experiencing, avoidance, and hyperarousal, CPTSD includes an additional set of symptoms referred to as Disturbances of Self-Organization (DSO) (WHO, 2019).

These include:

Emotional Dysregulation

Difficulty modulating intense emotional states, or alternatively, chronic emotional numbing.

Negative Self-Concept

Persistent beliefs of worthlessness, shame, or defectiveness. These are not fleeting thoughts, but deeply internalized conclusions about the self (Ehlers & Clark, 2000).

Interpersonal Disturbances

Patterns of relational avoidance, mistrust, or over-accommodation (e.g., people-pleasing) driven by perceived threat in connection.

Importantly, these patterns reflect learned adaptations to chronic relational danger—not inherent flaws in personality.

Emotional Flashbacks: When the Past Is Felt, Not Seen

In CPTSD, flashbacks are often not visual. Instead, they manifest as sudden, overwhelming emotional states, intense shame, fear, or helplessness, without an identifiable memory attached.

These experiences are best understood as conditioned emotional responses, in which present-day cues activate networks of past learning (Brewin et al., 2010). The individual is not recalling the past in a narrative sense—they are re-experiencing its emotional reality.

This helps explain why many individuals feel “younger” in moments of distress, or struggle to reconcile the intensity of their reactions with their current circumstances.

CPTSD and Borderline Personality Disorder: Overlap and Distinction

One of the most clinically significant areas of discussion in recent years has been the relationship between CPTSD and borderline personality disorder (BPD).

Borderline personality disorder is traditionally characterized by:

• Intense and rapidly shifting emotions
• Fear of abandonment and efforts to avoid it
• Unstable interpersonal relationships
• Identity disturbance
• Impulsivity and, in some cases, self-harm

These features can overlap with the disturbances seen in CPTSD, particularly emotional dysregulation and relational instability.

However, research suggests that what has historically been conceptualized as borderline pathology may, in some cases, reflect adaptations to chronic interpersonal trauma, particularly when symptoms emerge in the context of early developmental adversity (Herman, 1992; Cloitre et al., 2014).

CPTSD is more consistently associated with pervasive shame, threat sensitivity, and relational avoidance, whereas BPD emphasizes identity instability and fear of abandonment. That said, these are not mutually exclusive categories. They may represent overlapping ways of organizing trauma-related adaptations (Ford & Courtois, 2014).

This perspective allows us to reframe behaviors often labeled as “personality pathology” as meaningful, learned responses:

• Emotional intensity as a system sensitized to threat
• Relational volatility as an attempt to navigate unpredictable attachment environments
• Self-criticism as an internalized adaptation to chronic invalidation

This reframing does not minimize suffering, but rather it contextualizes it.

Treatment Guidelines for Complex PTSD

Although CPTSD is not formally included in the DSM-5-TR, there is growing consensus around how best to treat it. Treatment is typically phase-based, particularly for individuals with significant disturbances in self-organization (Cloitre et al., 2012; Herman, 1992).

1. Stabilization and Skill-Building

Treatment begins with establishing safety, both internal and relational. This includes:

• Emotion regulation skills
• Grounding and distress tolerance
• Psychoeducation about trauma responses

Without adequate stabilization, trauma processing can become overwhelming or ineffective.

2. Trauma Processing

Once stability is established, trauma-focused treatments can be introduced. The American Psychological Association identifies cognitive trauma-focused therapies such as Cognitive Processing Therapy (CPT) and Prolonged Exposure (PE) as first-line treatments for PTSD (APA, 2017).

For individuals with complex trauma, these treatments are often adapted in pacing and integrated with ongoing regulation and relational work. Research suggests that cognitive trauma therapies remain effective when delivered within this broader framework (Resick et al., 2012).

3. Integration and Identity Development

The final phase focuses on consolidating gains and rebuilding a coherent sense of self. This includes:

• Values clarification and meaning-making
• Restructuring relational patterns
• Developing self-compassion and agency

Treatment is not simply about symptom reduction; it is about restoring flexibility, coherence, and choice.

Reframing Survival: From Symptoms to Adaptations

One of the most important shifts in understanding complex trauma is recognizing that what we often call “symptoms” are, in fact, adaptations.

• Emotional overwhelm reflects a nervous system trained to detect threat
• Self-criticism reflects internalized survival strategies
• People-pleasing reflects relational adaptation in unsafe environments

These patterns are not evidence that something is wrong with you. They are evidence that your system learned how to survive.

Healing is not about becoming someone new. It is about loosening the grip of strategies that were once necessary, and reclaiming the parts of you that have always been there.

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If this resonates…

Understanding trauma is one step, but changing the patterns it leaves behind is another. At Breyta Psychological Services, we offer evidence-based, trauma-informed therapy designed to help you move beyond survival patterns and reconnect with a more grounded, intentional way of living; creating meaningful, lasting change.

If you’re ready to explore trauma therapy, you can learn more or request an appointment below.

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References

American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.; DSM-5-TR).

American Psychological Association. (2017). Clinical practice guideline for the treatment of posttraumatic stress disorder (PTSD) in adults. https://www.apa.org/ptsd-guideline/

Brewin, C. R., Gregory, J. D., Lipton, M., & Burgess, N. (2010). Intrusive images in psychological disorders. Psychological Review, 117(1), 210–232.

Cloitre, M., et al. (2012). Sequential treatment for childhood abuse-related PTSD. Journal of Consulting and Clinical Psychology, 80(3), 439–449.

Cloitre, M., et al. (2013). ICD-11 PTSD and CPTSD. European Journal of Psychotraumatology, 4, 20706.

Cloitre, M., et al. (2014). Distinguishing PTSD, CPTSD, and BPD. European Journal of Psychotraumatology, 5, 25097.

Ehlers, A., & Clark, D. M. (2000). A cognitive model of PTSD. Behaviour Research and Therapy, 38, 319–345.

Ford, J. D., & Courtois, C. A. (2014). Complex PTSD and BPD. Borderline Personality Disorder and Emotion Dysregulation, 1, 9.

Herman, J. L. (1992). Trauma and recovery. Basic Books.

World Health Organization. (2019). ICD-11.

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About the Author
Dr. Vanessa H. Roddenberry is a licensed clinical psychologist and founder of Breyta Psychological Services, a trauma-focused practice based in North Carolina. She specializes in evidence-based treatments for PTSD and complex trauma, including Cognitive Processing Therapy (CPT), and works with adults and couples to address the lasting impact of trauma on identity, relationships, and emotional functioning.