Your shoulders are tense. Your jaw is tight. Nothing happened. The body is running a threat response for a threat that never arrives — and it has been doing this for longer than you think.
Someone pointed it out to me once — a friend, matter-of-factly, during an ordinary conversation: you’re holding your shoulders up.
I didn’t know what she meant until I paid attention. My shoulders were raised, slightly but consistently, in a way I hadn’t consciously chosen. I tried to drop them. They dropped an inch and then, within thirty seconds, returned to where they had been. As if that were their resting position. As if the resting position involved being ready for something.
Nothing was happening. It was a Tuesday afternoon. There was no threat in the room.
I had been doing this for so long I had stopped noticing it. The body had its own arrangement — one that had nothing to do with what was currently occurring and everything to do with what had once been necessary to survive.
Hypervigilance is one of those words that sounds clinical until you recognise it in your own body. Then it sounds like a description of something you assumed was just your personality — the way you always sit with your back to the wall in restaurants, the way a raised voice in the next room pulls your attention before you decide to pay attention to it, the way you read other people’s moods before they’ve said anything, with a speed and accuracy that sometimes surprises even you.
These are not quirks. They are a system. And the system has a history that predates any current threat by years — sometimes decades.
The Alarm That Forgot to Turn Off
It shows up differently in different people but the underlying structure is consistent. A persistent low-level tension in the body that never fully releases. An attentiveness to other people’s emotional states that operates automatically, before any conscious decision to pay attention. A difficulty with stillness — with being in a room where nothing is happening and not scanning it anyway.
There is often a particular quality of exhaustion that goes with it. Not the tiredness of having done too much. The tiredness of a system that has been running at a level of activation that the situation does not require — that has been, in effect, working hard at a job that no longer exists, in conditions that no longer apply.
People who carry this often describe themselves as anxious, as sensitive, as someone who is just wired this way. And in a technical sense that is true — the nervous system has been calibrated to this level of alertness and has maintained it so consistently that it has come to feel like baseline. It does not feel like a response to something. It feels like the way things are.
The body is not overreacting to the present. It is accurately responding to a past that it has not yet been told is over.
That distinction — between a response to what is happening now and a response to what once happened — is the one that changes everything. The shoulders up is not irrationality. It is a system doing exactly what it was built to do, in an environment where it was built to do it, long after that environment ceased to exist.
Where the System Was Built
Freud described signal anxiety — the anticipatory mobilisation of the body in response to a perceived threat — as one of the ego’s primary defensive functions (Freud, 1926). The ego learns, through experience, which situations precede danger, and it activates the alarm early enough to allow a response. This is adaptive. It is the mechanism that kept your ancestors alive.
What Freud was less equipped to address — and what later theorists developed — is what happens when the signal anxiety is calibrated in an environment of chronic unpredictability or threat, and then carried unchanged into environments where that calibration is no longer appropriate.
Bessel van der Kolk’s account of how the body encodes experience is useful here. Van der Kolk argued that the nervous system does not store threat-related experience the way declarative memory stores facts — as something you can consciously access and update. It stores it somatically: in muscle tension, in the activation threshold of the threat response, in the speed at which the alarm fires and the difficulty with which it is quieted (van der Kolk, 2014). The shoulders up is not a thought. It is a memory encoded in the body — a memory that does not know it is a memory because it has never been experienced as anything other than the way things are.
The environments that produce this calibration are often not dramatic. They are often environments of ordinary, chronic unpredictability: a parent whose mood determined the emotional weather of the household and whose mood was not reliably readable. A home where conflict could erupt without warning and therefore required constant monitoring to anticipate. A childhood in which attentiveness to other people’s states was not sensitivity but a practical survival skill — the thing that told you, before the door opened, what kind of evening it was going to be.
What the Research Finds in the Body
The neurobiological research on hypervigilance converges on a consistent picture. Stephen Porges’s polyvagal theory describes the autonomic nervous system not as a simple on/off switch between activation and rest, but as a hierarchical system with multiple states, each associated with different physiological and behavioural profiles (Porges, 2011). Chronic threat environments shift the system’s default toward states of mobilisation — fight or flight — and make the transition to the ventral vagal state associated with genuine rest and social engagement progressively more difficult.
What this means practically is that the person who grew up in a chronically unpredictable environment is not simply anxious in the way that word is commonly used. Their nervous system has a different baseline — one that is structurally oriented toward detection and preparation rather than rest and connection. Telling that person to relax is, neurobiologically, a request to override a system that was never designed to respond to instructions.
Allan Schore’s work on affect dysregulation adds another layer. Early caregiving environments that are chronically misattuned — where the caregiver’s own dysregulation is transmitted to the child through interaction — produce regulatory systems that have difficulty returning to baseline after activation (Schore, 2003). The system learns to stay activated because returning to baseline was never reliably available.
The friend who pointed out my shoulders was offering an observation I didn’t have the framework to receive at the time. The framework, when it arrived, didn’t relax the shoulders immediately. But it explained why they were there. And explaining why they were there was the first step toward being able to notice, sometimes, when they rise — and understand what that noticing is actually about.
The Difference Between Baseline and Normal
The most important shift that comes with understanding hypervigilance is the distinction between what is baseline and what is normal — between the level of activation your system has settled into and the level of activation that the current situation actually requires.
This sounds simple. It is not, because the baseline has been present for so long that it has come to feel definitional — like personality rather than history. The person who scans rooms automatically does not experience themselves as scanning. They experience themselves as being attentive. The person whose shoulders are raised does not experience tension. They experience readiness.
Recognising the system as a system — as something that was built in specific conditions, for specific reasons, and that has continued to operate after those conditions have changed — does not switch it off. The nervous system does not respond to conceptual understanding the way the mind does. But it introduces a different relationship to the activation. Instead of: this is how I am. Something closer to: this is what my system learned to do. And those are not the same thing.
The shoulders still rise. But now, occasionally, I notice when they rise. And noticing is not nothing. Noticing is the beginning of the body being able to learn something new — which it can do, given enough time and enough safety, even after decades of the other arrangement.
The Threat That Isn’t There
It is a Tuesday afternoon. Nothing is happening. The shoulders are up.
The system is doing what it was built to do — reading the environment for signals, preparing the body for a response, maintaining the readiness that once, in a different environment, was the difference between managing and not managing. It is not malfunctioning. It is functioning exactly as designed, for conditions that no longer apply.
Understanding this does not make the tension disappear. But it changes the meaning of the tension. It is not evidence of a fundamental unsafety in the present. It is evidence of a past that was genuinely unsafe, encoded in the body with a fidelity that the body, unlike the mind, cannot simply decide to revise.
The shoulders can learn to drop. It takes time, and it takes conditions that are different enough from the original environment for the system to register the difference. But the learning is possible. It starts with knowing what the shoulders are actually responding to — and understanding that what they are responding to is not here anymore.
References
Freud, S. (1926). Inhibitions, symptoms and anxiety (J. Strachey, Trans.). W. W. Norton.
Porges, S. W. (2011). The polyvagal theory: Neurophysiological foundations of emotions, attachment, communication, and self-regulation. W. W. Norton.
Schore, A. N. (2003). Affect dysregulation and disorders of the self. W. W. Norton.
van der Kolk, B. A. (2014). The body keeps the score: Brain, mind, and body in the healing of trauma. Viking.
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If You Want to Go Further
The book that most changed how I understood what was happening in my own body is Bessel van der Kolk’s The Body Keeps the Score. It is not a light read — it covers ground that is difficult for anyone who recognises themselves in it — but it is the most precise account I know of how experience is encoded in the body rather than in memory, and why the nervous system does not respond to instructions the way the mind does. The chapter on hypervigilance alone is worth the whole book.
