When the Trauma Wasn't a Single Moment - It Was Your Whole Childhood

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Complex PTSD: What It Is and How It Differs from PTSD

Most people have heard of PTSD. The image that tends to come to mind is a veteran, a survivor of a single catastrophic event: a crash, an assault, a disaster. And while that picture isn't wrong, it's incomplete. There's another form of trauma response that I see regularly in my clinical work, one that is often missed, misdiagnosed, and misunderstood. It's called Complex PTSD, or C-PTSD, and it deserves far more attention than it currently gets.

What is PTSD?

Post-traumatic stress disorder develops after exposure to a traumatic event — something that involved actual or threatened death, serious injury, or sexual violence. The core features are well-known: flashbacks, nightmares, hypervigilance, avoidance of reminders, and a nervous system that remains stuck in threat mode long after the danger has passed.

PTSD can be severely debilitating, but it tends to have a relatively identifiable trigger (a discrete event or series of events) and evidence-based treatments like EMDR and trauma-focused CBT have a good track record.

So what makes Complex PTSD different?

Complex PTSD was first described by psychiatrist Judith Herman in the early 1990s, though it has only recently been formally recognised in the ICD-11 diagnostic classification. It develops not from a single traumatic event, but from prolonged, repeated trauma, particularly trauma from which escape feels impossible.

This might include:

• Childhood abuse or neglect (physical, emotional, or sexual)

• Growing up with a parent with severe mental illness or addiction

• Domestic violence over months or years

• Prolonged institutional abuse

• Repeated community violence or persecution

What these situations share is that the trauma was ongoing, inescapable, and often inflicted by someone who was supposed to provide care or safety. That last part matters enormously.

The three extra dimensions of C-PTSD

C-PTSD includes all the features of PTSD, but adds three additional clusters of symptoms that reflect the deeper impact of chronic, relational trauma:

Difficulties with emotional regulation. People with C-PTSD often experience emotions as overwhelming and uncontrollable including explosive anger, sudden despair, or complete emotional numbness. They may describe feeling like they have no skin, or conversely, feeling nothing at all.

Negative self-concept. This goes far beyond low mood. People with C-PTSD frequently carry a deep, pervasive sense of shame and a belief that they are fundamentally flawed, broken, or worthless. This isn't a thought they can easily challenge or reframe; it feels like a fact about who they are.

Difficulties in relationships. When early relationships were the source of harm, trusting others becomes genuinely dangerous; this is not irrational, but adaptive. People with C-PTSD may oscillate between craving closeness and pushing people away, struggle with boundaries, or find themselves repeatedly drawn into relationships that replay earlier dynamics.

Why it gets missed

C-PTSD is frequently misdiagnosed. I see it presenting as treatment-resistant depression, emotionally unstable personality disorder, chronic anxiety, or simply "complex mental health needs" that don't seem to fit neatly anywhere. Sometimes people have spent years in services without anyone ever asking in detail about their childhood or relationship history.

Part of the problem is that people with C-PTSD don't always present as visibly traumatised. They may be highly functional, outwardly composed, professionally successful. The trauma is often carried quietly in the body, in shame and in patterns of relating that they may not even recognise as connected to what happened to them.

There's also a tendency, even among clinicians, to focus on the presenting symptoms: the self-harm, the emotional crises, the relationship difficulties, without asking what those symptoms are communicating.

What helps

Treatment for C-PTSD requires a different approach to standard PTSD. Jumping straight into trauma processing is rarely appropriate and can be destabilising. Instead, effective treatment usually follows a phase-based model:

First, stabilisation: building emotional regulation skills, establishing safety, developing a therapeutic relationship strong enough to hold what comes next.

Then, trauma processing: carefully and collaboratively working through traumatic memories at a pace the person can tolerate.

Finally, integration: making sense of what happened, rebuilding identity and relationships, and reconnecting with life.

Therapies with the strongest evidence base include EMDR adapted for complex trauma, schema therapy, and somatic approaches that work with the body's role in holding traumatic experience.

C-PTSD and neurodivergence: a combination that's easily missed

This is something I want to address specifically, because I see it often in my practice and it remains poorly understood even within mental health services.

Autistic people and those with ADHD are significantly more likely to have experienced trauma. This isn't coincidental. Growing up neurodivergent in a world not designed for you — being misunderstood, punished for differences, excluded, bullied, or subjected to environments that were genuinely overwhelming. This creates real and lasting harm. For many neurodivergent people, this wasn't a single event. It was the texture of daily life for years.

Add to this the higher rates of adverse childhood experiences, the increased vulnerability to abusive relationships in adulthood, and the way that masking and people-pleasing can leave someone chronically unable to protect themselves, and the picture becomes clearer. Trauma and neurodivergence frequently co-exist, and when they do, each makes the other harder to see.

There are several ways this combination creates diagnostic confusion. The emotional dysregulation of C-PTSD can look like ADHD. The social withdrawal and sensory sensitivity of autism can look like trauma avoidance. The shame and negative self-concept of C-PTSD can be attributed to low self-esteem or depression, without anyone connecting it to a history of chronic invalidation. And when someone finally receives a neurodevelopmental diagnosis in adulthood, the focus understandably shifts to the ADHD or autism and the trauma can get left behind.

The reverse also happens. Someone is identified as having C-PTSD and receives trauma-focused therapy, which helps, but only partially, because the underlying neurodivergent profile was never recognised, and some of what they've been working to "fix" is simply how their brain works.

Getting this right matters. A neurodivergent person with C-PTSD needs both things addressed — ideally by clinicians who understand the interaction between them. Trauma therapy alone won't resolve the neurodevelopmental picture. And a neurodevelopmental assessment alone won't heal the relational and emotional wounds that trauma leaves behind.

If you've had a neurodevelopmental assessment and felt that something was still being missed, or if you've had trauma therapy and wondered why certain things haven't shifted it may be worth considering whether both pieces are part of your story.

A note on language

Some people find the diagnosis of C-PTSD genuinely helpful as a framework that makes sense of a lifetime of experiences that have felt chaotic or inexplicable. Others find it reductive, or prefer not to think of themselves in diagnostic terms at all. That's entirely valid. What matters is not the label, but whether someone is getting support that recognises the full picture of what they've been through.

If you recognise yourself in any of this or someone you care about

please know that what you're experiencing has a name, has an explanation, and has a treatment path. You are not broken. You are responding, in deeply human ways, to things that should never have happened to you.

If you're struggling with the impact of past trauma and would like to explore whether a psychiatric assessment might help, you're welcome to get in touch with Kernow Psychiatry.