How Childhood Trauma Affects Your Nervous System as an Adult

How Childhood Trauma Affects Your Nervous System as an Adult

RELATIONAL TRAUMA & CHILDHOOD WOUNDS • April 12, 2026

LAST UPDATED: APRIL 2026

When Your Body Won’t Let You Rest

It’s 11:47 p.m. Morgan closes her laptop after fourteen hours of back-to-back calls, a board presentation, and two performance reviews she delivered with complete composure. She pours a glass of water, sits down on the couch — and her heart is still racing. There’s nothing left on today’s list. The house is quiet. But her body doesn’t know that. It’s still braced, still scanning, still waiting for something to go wrong. She’s been this tired for years. And she’s never once been able to just rest.

I hear some version of this story every single week in my work with clients. Driven, ambitious women — cardiologists, startup founders, senior partners — who have mastered every external demand and can’t figure out why their internal world feels like a smoke alarm that won’t stop going off. They’ve read the books. They’ve tried the meditation app. They keep their calendars color-coded and their professional reputations flawless. And still, the hypervigilance. The hair-trigger irritability. The sense that underneath all the competence, something is chronically, fundamentally wrong.

What’s happening isn’t a character flaw or a discipline problem. It’s biology. Specifically, it’s the long-reach of childhood trauma — which doesn’t vanish when you grow up and build an impressive life. It encodes itself into the architecture of your nervous system. And it keeps running the show until it’s addressed directly.

This post is for the women who’ve wondered why they can negotiate multi-million dollar deals without flinching but completely shut down in a difficult conversation with their partner. Why they’re exhausted but can’t sleep. Why they’re successful but never safe. The answer lives in your nervous system — and understanding it is where healing has to begin.

What Is Childhood Trauma, Really?

Most people think of trauma as a single catastrophic event — a car accident, a war, an assault. But the research paints a much more expansive picture, and understanding this distinction matters enormously for women who grew up in households that looked functional from the outside.

Trauma researchers distinguish between what Judith Herman, MD, psychiatrist and professor of clinical psychiatry at Harvard Medical School, calls “Type I” trauma (a single acute incident) and “Type II” trauma — repeated, prolonged, relational violations that occur over years. It’s Type II that tends to shape the nervous systems of driven women who grew up in emotionally unpredictable, neglectful, or controlling households. The wound isn’t one moment. It’s the cumulative weight of a thousand small moments in which you learned the world wasn’t safe and your emotional needs didn’t matter. (PMID: 22729977)

Childhood trauma includes not only overt abuse but also what’s often called “small-t” trauma — growing up with a parent who was emotionally unpredictable, with chronic criticism, with love that was conditional on performance, with silence that felt like punishment, with the constant low-grade requirement to manage your parents’ emotional states instead of your own. Many of the women I work with didn’t have dramatic childhoods by anyone’s visible metric. They had childhoods that were quietly demanding in ways that nobody named.

What matters, neurologically, isn’t the label we put on the experience. What matters is what the experience taught your nervous system about safety, threat, and what it takes to survive.

If you’ve ever asked yourself why you never feel quite good enough no matter your accomplishments, or why success doesn’t produce the relief it’s supposed to — this is part of the answer. The nervous system that got you here was shaped by experiences that pre-date your career, your relationships, your adult identity entirely.

The Neurobiology: What Trauma Does to a Developing Nervous System

Here’s what the research shows — and it’s remarkable enough that I want to walk through it slowly, because understanding this can change the way you relate to everything your body does.

A child’s nervous system is not a miniature adult nervous system. It’s an adaptive, plastic system that learns — in real time, from the relational environment — what the world requires. Bessel van der Kolk, MD, psychiatrist and trauma researcher and author of The Body Keeps the Score, has spent decades documenting how early traumatic stress literally reorganizes the brain: reducing the volume of the hippocampus (memory and context), dysregulating the amygdala (threat detection), and weakening the prefrontal cortex’s ability to modulate fear responses. (PMID: 9384857)

The polyvagal theory developed by Stephen Porges, PhD, neuroscientist and professor of psychiatry at Indiana University School of Medicine, gives us a particularly useful map. Porges describes how the vagus nerve — the longest cranial nerve in the body, running from the brainstem to the gut — regulates our capacity for social engagement, calm, and connection. When childhood environments are chronically unpredictable or threatening, the vagal system doesn’t develop the same flexible regulation it does in safer early environments. The result, in adulthood, is a nervous system that either over-fires (hyperarousal: anxiety, scanning for danger, irritability, hypervigilance) or under-fires (hypoarousal: dissociation, numbness, shutdown, disconnection).

The ACE study — the Adverse Childhood Experiences study, a landmark research collaboration between the CDC and Kaiser Permanente that surveyed more than 17,000 adults — found that traumatic childhood experiences are strongly correlated with disrupted stress-response systems that persist into adulthood and contribute to long-term health outcomes across physical, mental, and relational domains. This isn’t metaphor. It’s physiology.

What’s also crucial to understand is that the nervous system doesn’t distinguish between past threats and present ones. If your early caregiving environment taught your amygdala that emotional intensity means danger, your amygdala will keep flagging emotional intensity as danger — even when you’re a forty-one-year-old surgeon in a safe relationship, sitting in a perfectly pleasant dinner party. The original threat is long gone. But the nervous system’s learned response is still very much operational.

This is why so many of the women I work with describe feeling like they’re operating out of two different realities simultaneously: the competent, composed adult who handles everything, and the barely-contained internal state that feels nothing like that. If that’s your experience — it makes complete neurobiological sense. Dissociation during high-stakes moments and emotional flooding in intimate ones are two sides of the same dysregulated coin.

How a Dysregulated Nervous System Shows Up in Driven Women

Here’s where it gets specific — because dysregulation doesn’t look the same in a driven, ambitious woman as it does in the clinical textbooks. These women are often extraordinarily well-defended. They’ve built entire professional identities around appearing competent and composed. The dysregulation doesn’t show up in ways that get them sent home from work. It shows up in the gaps.

In my work with clients, I see several recurring patterns that are almost always rooted in nervous system dysregulation shaped by early relational trauma.

The hyperarousal cluster — chronic anxiety that lives just beneath the surface of a perfectly organized life. Difficulty sleeping even when exhausted. A sense of dread that has no specific object. Physical tension in the jaw, the shoulders, the chest. Snapping at people who are safe when something small goes wrong. Needing to over-prepare for everything because the internal experience of being caught off-guard feels unbearable. If you’ve wondered why you feel like you’re always waiting for the other shoe to drop, this is hyperarousal.

The hypoarousal cluster — the other end of the dial, equally common and much less discussed. Sudden emotional numbness in situations that should feel meaningful. Going blank during an important conversation. Feeling disconnected from your own body. A flatness that arrives without warning and is very difficult to explain to anyone who hasn’t felt it. Sometimes these women describe feeling like they’re watching themselves from a slight distance — present in the room but not entirely in their own experience. This is a dorsal vagal shutdown response — the nervous system’s oldest, deepest defense.

Relational dysregulation — the nervous system has very strong opinions about intimacy. If your early attachment figures were also sources of threat or unpredictability, closeness will feel dangerous at some level, even with people who are entirely trustworthy. This can look like avoiding vulnerable conversations, feeling suffocated when a partner wants more connection, or conversely, a pull toward people who replicate early relational patterns — because the nervous system finds what’s familiar, even when familiar means painful. I explore this in depth in the betrayal trauma complete guide.

The performance-as-regulation pattern — this is the most invisible one, and arguably the most common in this population. Achieving feels calming. The urgency of a deadline creates a kind of nervous system focus that temporarily quiets the background noise. Work becomes the primary nervous system regulator — which means the moment the achievement stops (vacation, retirement, a weekend with no plans), the dysregulation floods back in. Many of the women I work with describe feeling most like themselves when they’re at peak productivity and least like themselves when they have nothing pressing to do. That’s not ambition. That’s a nervous system using performance to manage itself.

Lucia sits across from me on a Tuesday afternoon. She’s thirty-eight, the chief marketing officer of a fintech startup that just closed a Series B round, and she came to therapy because her husband told her she’d been unreachable for two years. She nods when I describe the performance-as-regulation pattern. “I thought I just loved working,” she says. “But now I think I don’t know what I am without a goal.” She pauses. “When I was a kid, if I did everything right, it was usually fine. If I stopped doing everything right, it wasn’t.” Her nervous system didn’t forget that equation. It just got bigger.

If you recognize yourself in any of this, I’d encourage you to take the free quiz to begin identifying the specific childhood wound beneath the pattern. Knowledge is a form of nervous system regulation in itself — because it finally gives your experience a name.

The Freeze Response Nobody Talks About

Most conversations about trauma focus on fight-or-flight — the sympathetic nervous system activation that produces anxiety, anger, and urgency. But there’s a third trauma response that I find is dramatically underdiagnosed in driven women, and it’s the one most likely to be mistaken for something else entirely.

The freeze response — or what polyvagal theory calls the dorsal vagal shutdown state — is the nervous system’s most ancient survival mechanism. It evolved before the social engagement system, before fight-or-flight, in the deep evolutionary history of vertebrates. When a threat is perceived as inescapable, the nervous system shifts into a conservation mode: heart rate drops, body temperature decreases, cognitive processing narrows, and the individual can appear entirely calm — even dissociated — while internally in a state of profound distress.

For a child who couldn’t fight her parents and couldn’t flee the household, freeze was often the most available option. And like all survival adaptations, it got wired in. In adulthood, the freeze response tends to surface in moments of high emotional stakes: going blank during a difficult conversation with a partner, shutting down when confronted at work, suddenly becoming incapable of decision-making when you’ve been perfectly decisive all morning, finding yourself unable to respond to a text that requires any emotional honesty.

Driven women often find freeze particularly distressing because it is so incongruent with their self-image. The same woman who gave a flawless keynote at 9 a.m. cannot form words when her partner asks what she’s feeling at 7 p.m. She doesn’t recognize herself. She may interpret the shutdown as proof of inadequacy, emotional immaturity, or fundamental brokenness. It isn’t any of those things. It’s an old nervous system pattern doing what it was designed to do — protect you when the threat feels too large to manage any other way.

Understanding how you can be depressed and still performing well at work is often tied directly to this freeze-and-function pattern. You’ve learned to compartmentalize the shutdown. The compartmentalization is impressive. It’s also extraordinarily costly.

There’s also a fourth response — fawning — that deserves its own naming here. First described by therapist Pete Walker, fawning is the trauma response that looks least like survival and most like kindness. It’s the reflexive move toward appeasement, agreement, and self-erasure in the face of potential conflict. Many driven women who were raised in households where expressing needs was dangerous became exquisitely skilled fawners — accommodating, people-pleasing, perpetually attuned to others’ emotional states while systematically ignoring their own. If you recognize signs of fawning at work, that pattern likely began somewhere much earlier.

Both/And: You Can Be Capable and Still Be Dysregulated

I want to name something explicitly, because I see it cause enormous suffering in the women I work with: the assumption that capability and dysregulation are mutually exclusive. That if you’re truly struggling, you’d be less functional. That if you’re this functional, you must not be truly struggling.

This is a false binary, and it’s one that keeps driven women from seeking help for years — sometimes decades.

The nervous system is extraordinarily good at compartmentalization. It can maintain high executive function in structured, achievement-oriented contexts while being completely flooded, shutdown, or dysregulated in intimate, unstructured, or emotionally vulnerable ones. The brain regions required for professional performance — working memory, strategic thinking, task completion — can remain largely intact even when the limbic system is running in a chronic state of alarm. This is one of the reasons childhood trauma is so systematically underdetected in populations of driven, successful women. The external evidence doesn’t match the internal reality.

What I see consistently is this: the more demanding and well-structured the environment, the more the nervous system can organize itself around external requirements. The problematic dysregulation shows up in the unstructured spaces. In relationships. In the body. At night. On vacations. In the moments between accomplishments when there’s nothing left to do and you’re alone with yourself.

Morgan — the woman from the opening of this post — knows that her career is the clearest evidence that she’s fine. She cites it when she’s feeling bad about herself. And I understand why. Her career is genuinely impressive. She worked hard for it. It required real cognitive and emotional capacity. But it’s also the nervous system’s most reliable regulatory tool. She can be both of these things: competent and dysregulated. Accomplished and unhealed. A world-class professional and a woman whose inner life has been running on fumes since childhood.

Both/And framing matters here because it creates space for the full truth. You don’t have to choose between acknowledging your capability and acknowledging your pain. You don’t have to downplay what you’ve built to validate that something underneath it needs attention. The goal isn’t to pathologize success — it’s to free success from having to do a job it was never designed to do.

If you find yourself wondering whether your experience is serious enough to warrant real support, I’d invite you to read more about what it means to have raised yourself even when your parents were physically present. That kind of invisible neglect is one of the most common roots of the both/and split — and it’s far more common than most people realize.

The Systemic Lens: Why This Isn’t a Personal Failing

I want to step back for a moment and name something that gets lost in a lot of clinical conversations about childhood trauma: the systems that produced it.

When we talk about nervous system dysregulation as a response to childhood experience, it can accidentally slide into a narrative that places all the weight on the individual. You were traumatized. Your nervous system adapted. Now you do the work to heal it. That’s true — and it’s incomplete. Because childhood trauma doesn’t happen in a vacuum. It happens inside families, inside cultures, inside economic systems, inside gender structures that shape what parenting looks like and what children are allowed to need.

Many of the women I work with were raised by parents who were themselves products of unaddressed trauma — parents who didn’t have the language, the resources, or the relational models to do anything different from what was done to them. Many grew up in cultures where emotional expression was a liability, where asking for help was weakness, where the appearance of competence was the primary family currency. Many were shaped by a culture that socializes girls to attune to others’ needs above their own — making the fawn response not just a trauma adaptation but a gendered expectation.

When we ask why so many driven, ambitious women are carrying dysregulated nervous systems beneath their impressive lives, part of the answer is the particular pressures that their particular families were navigating. Economic precarity. Immigration stress. Racial trauma. The compounded pressure of raising daughters inside a culture that simultaneously demands their achievement and punishes their ambition. These aren’t side notes. They’re the context in which the nervous system had to develop.

This doesn’t mean individuals aren’t responsible for their own healing. They are. But it means that healing isn’t a solo project, and it isn’t a personal failure that you need healing in the first place. The nervous system did exactly what it needed to do with the environment it was given. If you’ve been wondering why you can avoid conflict at home but negotiate skillfully in boardrooms, or why you can lead teams but struggle to express a simple emotional need to your partner — some of that is individual history. And some of it is the water every woman in your generation swam in.

The systemic lens also matters for healing. Community, connection, and safe relational experiences aren’t soft add-ons to therapy — they’re biologically necessary components of nervous system repair. The nervous system dysregulates in relationship. It also heals in relationship. Isolation, perfectionism, and the relentless self-sufficiency that high-performing women often armor themselves with are, paradoxically, the conditions that make healing hardest. Real support isn’t a luxury. For a nervous system that learned early that people weren’t safe, it’s the medicine.

How to Begin Healing Your Nervous System

Healing a nervous system that was shaped by childhood trauma is not a weekend retreat. It’s not a gratitude practice. It’s not a better morning routine. I want to be honest about that, because driven women in particular are accustomed to effort producing results, and the timeline here is genuinely longer and more nonlinear than most achievement-oriented interventions.

That said — it is absolutely possible. And it begins with a few specific principles that distinguish effective nervous system healing from the kind of personal development work that makes the external look better while leaving the internal untouched.

Start with the body, not the mind. Insight is not enough. Understanding that your nervous system was shaped by childhood trauma is useful — but understanding it doesn’t change the nervous system patterns. The body-based modalities — somatic therapy, EMDR, sensorimotor psychotherapy, Somatic Experiencing — are specifically designed to work at the level where the patterns actually live. Talk therapy alone, especially if it’s primarily cognitive, often doesn’t reach far enough down. Bessel van der Kolk, MD, psychiatrist and trauma researcher and author of The Body Keeps the Score, has been clear on this: the body is where trauma is stored, and the body is where healing has to happen.

Safety before insight. The nervous system cannot take in new information — cannot learn, update, or regulate — while it’s in a threat state. This is why therapeutic work that moves too fast, or that pushes toward emotional processing before safety is established, often doesn’t hold. The first work of nervous system healing is building enough felt sense of safety that the system can begin to tolerate new experiences. This takes time. It requires a therapeutic relationship that itself becomes a corrective attachment experience.

Small, repeated doses of new experience. The nervous system changes through repeated, small experiences of something different — not through one dramatic breakthrough. Each time you stay regulated when you might have flooded, each time you express a need when you might have suppressed it, each time you let yourself be seen when you might have hidden — you’re creating a new data point for your nervous system’s ongoing threat assessment. Over time, accumulated new data begins to update the old predictions. This is slow. It’s also real.

Relational repair is biological, not metaphorical. As Stephen Porges, PhD, neuroscientist and professor of psychiatry at Indiana University School of Medicine, describes in his work on polyvagal theory, the ventral vagal system — the branch of the autonomic nervous system responsible for social engagement and calm — is regulated by cues of safety in the environment, and particularly by other nervous systems. Safe relationships — with a skilled therapist, with a trusted partner, with a genuine community — literally change the regulatory patterns of the autonomic nervous system over time. This is why trauma-informed individual therapy is often the most direct path: not because it’s the only path, but because it creates a dedicated relational container for exactly this kind of nervous system repair.

Give yourself longer than you think you need. I say this with genuine compassion for the women who come to me after years of being their own harshest project managers. The nervous system was shaped over years of formative experience. It doesn’t reset in eight weeks. Progress is real, and it’s often visible well before healing is complete — but sustainable change at the level of nervous system patterns typically requires sustained engagement over time. If you’re considering what kind of support makes sense, I’d encourage you to explore working one-on-one as a starting point for understanding what level of support fits your specific situation.

Lucia, my client from earlier, has been in therapy for seven months now. She recently told me about a moment at home — her daughter had a meltdown over something small, and Lucia sat with her on the kitchen floor and regulated alongside her instead of snapping or going blank. “I didn’t know I could do that,” she said. “I didn’t know that was available to me.” She hadn’t known, because her nervous system never had that modeled. Now it has a new data point. Seven months of new data points. That’s how it works — not dramatically, not all at once, but cumulatively, in the small moments that add up.

If you’re wondering where to start, the Fixing the Foundations course is a structured, self-paced entry point into this work — designed specifically for the kind of relational and developmental healing that underpins nervous system dysregulation. And if you’re ready for something more intensive, connecting for a consultation is always available.

The nervous system you have isn’t a life sentence. It’s a history. And histories can be updated — slowly, relationally, with proper support, and in genuine community with others doing the same work. You don’t have to keep living on high alert. There’s a different way your body can learn to feel — and it’s worth every step it takes to get there. If you’re looking for a community of women doing exactly this kind of honest, grounded work, the Strong & Stable newsletter is where those conversations live each week.

Medical Disclaimer

Medical Disclaimer