Complex PTSD (C-PTSD)

Complex PTSD (C-PTSD) is a trauma-related mental health condition in which a person has the core symptoms of post-traumatic stress disorder together with long-lasting difficulties regulating emotions, a deeply negative sense of self, and problems feeling close to others. It most often develops after prolonged or repeated trauma from which escape is difficult or impossible, such as ongoing childhood abuse, domestic violence or captivity.

The idea was introduced by psychiatrist Judith Herman in 1992, in a journal article and in her book Trauma and Recovery. It was formally recognized when the World Health Organization included complex PTSD in the ICD-11, adopted in 2019 and in use since 2022. The American Psychiatric Association's DSM-5-TR does not list it separately, which is one reason the term can be confusing.

Understanding Complex PTSD

What Is Complex PTSD?

The "complex" in complex PTSD refers both to the nature of the trauma, usually multiple, repeated or prolonged, and to the broader range of symptoms. People with C-PTSD experience the familiar symptoms of PTSD, such as intrusive memories, avoidance and feeling constantly on guard. They also experience problems that reach into their sense of who they are and how they relate to others.

Importantly, ICD-11 diagnoses C-PTSD by its symptoms, not by the type of trauma. Prolonged trauma raises the likelihood of C-PTSD, but some people develop it after other experiences, and many people who endure prolonged trauma do not develop it.

Historical Context

Who Develops C-PTSD?

Research consistently links C-PTSD to interpersonal trauma that is repeated or prolonged, especially when the person is dependent on, or trapped with, those causing harm. Examples include:

• Prolonged childhood physical, sexual or emotional abuse, or chronic neglect.
• Domestic violence and coercive control.
• Human trafficking and exploitation.
• Captivity, torture, or being a prisoner of war.
• Repeated exposure to war, genocide or persecution.

The Impact of Developmental Timing

Trauma that begins in childhood can be especially disruptive because it occurs while a child is learning to manage emotions, form relationships and develop a sense of self. Children who grow up amid fear and unpredictability may learn that people are unsafe, that their feelings are dangerous or unimportant, and that they themselves are to blame. These lessons can persist into adulthood. Our guide to childhood trauma explores these effects.

C-PTSD vs. PTSD: Key Differences

Symptom Profile

ICD-11 treats PTSD and C-PTSD as sibling diagnoses: a person receives one or the other, not both. Note that ICD-11's PTSD is narrower than DSM-5-TR's PTSD, which has 20 symptoms across four clusters. Our comparison of PTSD vs. complex PTSD goes into more detail.

Treatment Considerations

Both conditions respond to trauma-focused therapy, but people with C-PTSD often benefit from more attention to emotion regulation, shame and relationships, and may need a longer course of treatment.

Diagnostic Recognition

Causes and Risk Factors

C-PTSD arises from trauma, but not everyone exposed to similar experiences develops it. Factors that appear to raise risk include:

• Type and duration of trauma: repeated, interpersonal and early-life trauma is more strongly linked to C-PTSD than single events.
• Relationship to the perpetrator: harm by a caregiver or partner, on whom the person depends, is particularly damaging.
• Multiple types of trauma: experiencing several kinds of adversity, sometimes called polyvictimization.
• Lack of support: not being believed or protected, or being blamed, after trauma.
• Ongoing stress: poverty, discrimination or continued danger. See racial trauma.

Protective Factors

At least one stable, caring relationship, being believed and supported, access to safety, and opportunities to develop skills and a sense of competence all reduce risk and support recovery. Research on resilience highlights the powerful role of supportive relationships.

Symptoms and Diagnostic Criteria

ICD-11 Diagnostic Criteria

ICD-11 describes complex PTSD as a disorder that may develop after exposure to an event or series of events of an extremely threatening or horrific nature, most commonly prolonged or repetitive events from which escape is difficult or impossible. All core PTSD requirements must be met, plus the three disturbances in self-organization, causing significant impairment.

Core PTSD Symptoms

• Re-experiencing in the present: vivid intrusive memories, flashbacks or nightmares, accompanied by strong emotions such as fear or horror.
• Avoidance: of thoughts, memories, activities, situations or people that bring back the trauma.
• Sense of current threat: persistent hypervigilance or an exaggerated startle response.

Disturbances in Self-Organization (DSO)

Assessment

Clinicians assess C-PTSD through careful interviews. The International Trauma Questionnaire (ITQ), developed by Marylene Cloitre and colleagues in 2018, is a brief self-report measure designed to match ICD-11 criteria and is widely used in research and clinics. Like all questionnaires, it supports but does not replace a professional assessment.

Common Associated Features

• Dissociation: feeling detached from oneself (depersonalization) or from surroundings (derealization). See dissociation.
• Physical symptoms: chronic pain, digestive problems, headaches and sleep problems are more common in people with trauma histories.
• Cognitive difficulties: problems concentrating and remembering, especially under stress.
• Coping behaviors: some people use substances, disordered eating or self-harm to manage overwhelming feelings. These are signs of distress that deserve compassionate professional help.

If you or someone you know is thinking about suicide or self-harm, please see our crisis resources for immediate support.

Impact on Daily Life

C-PTSD can affect nearly every area of life. At work or school, difficulties with concentration, conflict with authority figures, or fear of criticism can make it hard to perform at one's best. In relationships, trust may be difficult, and people may find themselves either withdrawing or repeating painful relationship patterns. Many describe feeling fundamentally different from others or permanently damaged.

Daily life can also be shaped by triggers, reminders that set off intense emotions or memories, sometimes without the person realizing the connection. Sleep problems, exhaustion and physical health complaints add to the burden. These difficulties are understandable adaptations to past danger, even if they no longer serve the person well.

Co-occurring Conditions

People with C-PTSD often experience other conditions, including depression, anxiety disorders, substance use problems, eating disorders and dissociative disorders.

C-PTSD and Borderline Personality Disorder

C-PTSD and borderline personality disorder overlap in emotion dysregulation and relationship difficulties, and both are associated with childhood adversity. Research comparing them, including a 2014 study by Cloitre and colleagues, suggests important differences: BPD typically involves an unstable, shifting self-image, frantic efforts to avoid abandonment and impulsive self-harm, whereas C-PTSD involves a consistently negative self-image, avoidance of closeness and the core PTSD symptoms. Some people meet criteria for both. See BPD vs. PTSD.

Neurobiology of Complex Trauma

Research on the brain and body in trauma-related conditions points to changes in systems that detect threat and regulate stress. Studies of PTSD, which include many people with complex trauma histories, report on average:

• Amygdala: heightened responses to threat-related cues.
• Prefrontal cortex: weaker top-down regulation of fear and emotion.
• Hippocampus: smaller average volume in some studies, which may relate to difficulty placing memories in context and distinguishing past from present.
• Stress hormones: altered regulation of the HPA axis, the body's hormonal stress system.

These findings are averages across groups. They do not show that anyone's brain is "damaged," and they cannot be used to diagnose an individual. Brain systems remain capable of change through neuroplasticity, and some changes have been shown to shift with successful treatment. Popular ideas that trauma is "stored in the body" have helped people feel understood, but researchers caution that some claims go beyond the evidence.

Treatment Approaches

Phase-Oriented Treatment Model

Judith Herman described recovery from complex trauma in three stages, which have strongly influenced clinical practice:

1. Safety and stabilization: establishing physical and emotional safety, building skills to manage emotions and daily life, and developing trust in the therapist.
2. Remembrance and mourning: processing traumatic memories at a manageable pace and grieving what was lost.
3. Reconnection: rebuilding relationships, identity and a meaningful life beyond the trauma.

These stages overlap in practice, and people often move back and forth between them.

The stabilization debate

Experts disagree about how long stabilization should last. The 2018 treatment guidelines from the International Society for Traumatic Stress Studies emphasize trauma-focused treatments for PTSD and note that some people with complex presentations may benefit from added skills work. Other researchers, such as Ad de Jongh and colleagues, argue that extended stabilization can delay effective trauma-focused treatment unnecessarily, and that many people with complex trauma histories tolerate and benefit from it directly. In practice, many clinicians tailor the approach to the person.

Psychotherapy Options

A 2019 meta-analysis by Thanos Karatzias and colleagues found that trauma-focused CBT, exposure-based therapies and EMDR reduced C-PTSD symptoms, including the disturbances in self-organization, compared with control conditions. Approaches used include:

EMDR (Eye Movement Desensitization and Reprocessing)

EMDR, developed by Francine Shapiro, involves recalling traumatic memories while attending to bilateral stimulation such as side-to-side eye movements. It is recommended for PTSD by the WHO and other guideline bodies, and is often adapted for complex trauma with additional preparation.

Trauma-Focused Cognitive Behavioral Therapies

Trauma-focused CBT, cognitive processing therapy and prolonged exposure help people process traumatic memories and challenge beliefs such as "it was my fault" or "I am broken."

STAIR Narrative Therapy

Developed by Marylene Cloitre, STAIR (Skills Training in Affective and Interpersonal Regulation) teaches emotion regulation and relationship skills before moving into a narrative account of the trauma. Trials have found it effective for people with childhood abuse histories.

Dialectical Behavior Therapy (DBT)

DBT skills for emotion regulation, distress tolerance and interpersonal effectiveness can help with affect dysregulation. A version called DBT-PTSD, developed in Germany by Martin Bohus and colleagues, combines DBT skills with trauma-focused work and has shown promising trial results.

Other Approaches

Compassion-focused therapy addresses the shame and self-criticism common in C-PTSD. Schema therapy works with deep-rooted patterns from childhood. Body-oriented approaches such as sensorimotor psychotherapy and parts-based approaches such as internal family systems are popular with some clinicians and clients, though their research base for C-PTSD is still limited. Group therapy can reduce isolation and shame.

Medication

Medication is not considered a primary treatment for C-PTSD. A doctor may discuss medication for certain PTSD symptoms, sleep problems, or co-occurring depression, as part of a plan that centers on psychological therapy. Decisions belong with a prescribing clinician.

Complementary Approaches

Practices such as yoga, mindfulness and grounding techniques can support wellbeing and help people feel more present in their bodies. Some trauma-sensitive yoga programs have shown benefits in small trials. These work best alongside, not instead of, professional care.

Recovery and Healing

What Recovery Looks Like

Recovery from C-PTSD rarely means forgetting what happened. It usually means that memories become less overwhelming, emotions feel more manageable, the inner critic softens, and relationships feel safer. Many people describe a growing sense of being the author of their own life rather than defined by trauma.

The Role of the Therapeutic Relationship

Because C-PTSD often stems from harm in relationships, a consistent, respectful and collaborative relationship with a therapist can itself be healing. Feeling able to say "no," set the pace and give feedback is important. Our guide to the therapeutic alliance explains why this matters.

Self-Compassion and Daily Life

Alongside therapy, many people find it helpful to build daily routines, practice self-compassion, notice triggers, and gradually invest in safe relationships. Post-traumatic growth, positive change that some people report after struggling with adversity, is possible, though it should never be expected or required.

Supporting Someone with C-PTSD

If someone close to you has C-PTSD, these general principles can help:

• Believe and validate: being believed is one of the most protective responses after trauma.
• Offer predictability: consistency and keeping promises help rebuild trust.
• Respect choice: avoid pressuring the person to talk about the trauma; let them lead.
• Learn about triggers: intense reactions may reflect past danger rather than the present moment.
• Encourage professional help without forcing it.
• Look after yourself: supporting someone with trauma can be demanding; seek your own support.

If the person expresses thoughts of suicide, take it seriously, stay with them if they are in immediate danger, and contact emergency services or a crisis line. Our guide on how to support someone and our crisis resources page can help.

Resources and Help

Reliable information is available from the US National Center for PTSD, the International Society for Traumatic Stress Studies, the UK's National Health Service and, in Australia, the Blue Knot Foundation, which focuses on complex trauma. To find professional support, look for a licensed clinician with specific training in trauma-focused therapies; our guides to finding a therapist and finding the right therapist explain what to ask.

Hope for Healing

Complex PTSD reflects the deep impact of prolonged trauma on emotions, self-image and relationships. Its symptoms are understandable responses to circumstances that were overwhelming, not personal failings. Recognition in ICD-11 has spurred research, and evidence now shows that trauma-focused therapies, often combined with skills for managing emotions and relationships, help many people. Recovery may take time and patience, but people with C-PTSD can and do build safer, more connected and more meaningful lives.