What Long-Term Expatriation Does to Your Nervous System

On why things can still feel hard even when your life abroad works on paper.

There’s a line I keep hearing — in interviews, in research calls, sometimes in my own head at the end of a long day:

“By any measure, I’ve figured it out. I just don’t understand why it still feels hard.”

On paper, life works for you abroad. The housing is sorted. The work is real. There are friends, a language you can mostly move through, a calendar that looks, to anyone watching, like a life that has integrated. And yet something in the system never fully stands down. The engine idles even when the car is parked.

What I want to name directly is that “something.” It isn’t just a mood, and it isn’t something you can fix with mindset or an “attitude of gratitude”. It’s about what long‑term expatriation does to the nervous system over time — slowly, structurally, and mostly out of view.

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The structural hum

In the six months of research I’ve been conducting with long‑term expats, migrants and returners — people kept reaching for a version of the same description: a low‑grade hum.

A near-silent, ongoing background effort to keep functioning across cultures, languages, and roles that don’t quite fit by default — without feeling fully relaxed in one version of home or another.

It shows up in the smallest places:

• At the supermarket, your brain doing an extra calculation — the word, the etiquette, the rhythm of the queue;

• In bureaucracy, the bracing you do before opening an envelope or an online portal in a language that was never your first;

• In a WhatsApp thread, switching registers and tongues mid‑sentence, holding three (or more) cultural codes at once so no one feels misread.

Each of these is tiny. None of them would register as “a problem” on their own. But the body registers them. In nervous system terms, this is continuous, low‑level activation rather than discrete spikes — a system that is always doing a little bit more than the room requires.

That’s the part that’s easy to miss:

On paper, you’re just living your life. In your nervous system,
you’re always doing a little bit more than the room requires.

Over the years, that extra effort becomes the ambient sound of your days. You stop noticing the hum because it has become the baseline.

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The narrowed window of tolerance

There’s a concept from my ongoing counselling training that helps explain why this accumulates instead of dissolving: the window of tolerance.

The “window” is the range where your system can take life in without either flooding (going into fight/flight) or shutting down (numbing, checking out). Inside it, you can think and feel at the same time. Outside it, the thinking part of the brain goes quiet and the body takes over.

Clinical work on chronic stress shows that long periods of being “on guard” or under threat can narrow that window over time. Research on migration, cultural bereavement, and identity loss indicates a similar pattern: people who have moved under strain or lived with ongoing uncertainty often show higher allostatic load — the cumulative “wear and tear” of stress on the body — years after the move.¹

Here’s what I’ve noticed about long‑term expat life: years of needing to stay a little bit alert — new systems, new codes, being visibly “other” — can subtly narrow that window. Anything that depletes resilience over time, including low-level hypervigilance and being perpetually on guard, shrinks the space you have to absorb the ordinary friction of a day.

You start to notice it in the disproportions:

• A schedule change that lands in your body like a crisis.

• A small admin demand that spikes your system as if something is genuinely wrong.

• An email that, objectively, is nothing — and yet leaves you wired for hours.

A few weeks ago, this hum showed up on a routine phone call to my local health center. I’d been referred by my GP and wanted to double-check that I’d bring everything I needed to the appointment I’d booked online. Before I’d even dialed, I could feel myself mentally rehearsing the Spanish, double‑checking my ID number, bracing for the possibility they’d correct me, or that I’d broken some invisible rule. The call itself lasted under three minutes and the person on the other end was kind. My body, meanwhile, behaved as if something significant was at stake the whole time.

It’s tempting to read that as I’m being dramatic, or I’m just wired this way. It isn’t. It’s a body that has learned to stay ready, and hasn’t yet been told clearly that it’s safe enough to rest.

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The cost of always reading the room

Here’s the pattern I see most in long‑term, high‑functioning movers — and in myself: you read the room before you even know what you think.

It becomes automatic. Scanning faces, tones, unspoken cultural rules. Adjusting your register before you’ve registered your own response. It’s an extraordinary skill, and it’s exactly the skill that builds a life abroad — it’s how you become fluent in people.

But under chronic load, that constant reading is work. The nervous system has to carry it. And it has a cost:

• It gets harder to know what you feel or want before you’ve calibrated to everyone else;

• You can end up feeling a few seconds behind yourself — present, but always processing;

• Even rest becomes something you manage rather than something you sink into.

In my research calls, people described this as being “slightly offshore” in their own lives, or “a fraction of myself” — never fully off duty, even in spaces that had become familiar.

There’s a quiet irony in this:

The same skill that helped you build a life abroad is the one that makes it hard to stop managing long enough to actually receive support.

Photo by Alexey Demidov

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Migratory grief and the body

Underneath the hum and the narrowed window, there’s a third layer — and it’s the one that gives the rest a shape.

In the clinical literature, the effect of long‑term life abroad has a name: migratory grief. Spanish psychiatrist Joseba Achotegui describes it as a partial, recurrent, multiple grief — not one loss, but a cluster of them that stay active over time. Research summaries list at least seven domains migration can cut into: family, language, culture, land, social status, group belonging, and a basic sense of safety.²

Importantly, the more extreme “Ulysses Syndrome” Achotegui describes is not framed as a disorder, but as a human response to stress that exceeds what a nervous system can reasonably be asked to hold. It should be noted that his primary research population is migrants and refugees who’ve gone through harrowing experiences, and are — understandably — dealing with layers of trauma on top of their grief.

A recent systematic review of migratory grief found that these layered losses are consistently associated with higher psychological distress over time, which is exactly what many people are describing as the low‑grade hum in their bodies.³

Most long‑term expats are not at that extreme. But they often live on the same continuum.

Migratory Grief: What No One Prepared You For Abroad

You can often feel where these losses live in the body:

• The loss of status — a subtle shrinking in rooms where your social and/or economic capital doesn’t translate as the “forever foreigner”;

• The loss of language — tension in the jaw, the half‑second of rehearsing a sentence before you say it;

• The loss of place — how your sleep shifts, how your sense of place flickers, how some parts of you only make sense “there” and feel slightly homeless “here.”

The mind can file these under handled. The body keeps a different ledger.

So this reassurance matters:

If you’re tired in ways that don’t match your calendar, migratory grief and a narrowed window of tolerance are a better explanation than I must not be trying hard enough.

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Why this isn’t “just” burnout or anxiety

Let me be careful here, because the overlap is real. Some people do meet criteria for burnout, or for anxiety, and those names are useful and worth taking seriously when they come from a licensed medical professional. What follows here is a way of understanding context, not a diagnosis.

But for many long‑term expats and returners, what shows up in the room isn’t a single diagnosable episode. It’s structural:

• It isn’t tied to one job you could leave or one acute stressor you could resolve;

• It is distributed — across years, across places, across the many versions of yourself you’ve had to assemble and reassemble in each new context;

• It sits at the intersection of nervous system load and cumulative, under-recognized loss.

That distinction matters because of what it implies.

This isn’t a personal failing to correct. It’s a context to understand.

You’re not broken for feeling this way in a life that looks fine. You’re living in a body that has been working overtime across contexts for longer than it should have.

On paper, you’re thriving in your life abroad. In your nervous system, you’re always doing a little bit more than the room requires.

Naming as a form of relief

So let’s return to the line we started with:

“By any measure, I’ve figured it out. I just don’t understand why it still feels hard.”

The gentlest honest answer I have is this:

Because your body has been doing more than anyone — including you — has accounted for.

There isn’t a neat fix in this essay, and I don’t think you need to diagnose yourself. The first intervention is smaller and kinder than that.

It’s naming.

Recognizing the hum. Noticing the narrowed window. Letting migratory grief be a real thing your body is carrying, rather than a character flaw. Naming gives you somewhere to stand that isn’t I’m the problem.

So this is where I’ll leave you — with presence, not prescription:

You don’t have to push through, and you don’t have to turn this into a project. You can start by noticing what your body has been doing on your behalf all this time — and letting that count as evidence.

If you’d like to go further

When have you felt the low-grade hum in your life abroad? The version that lives in small moments… the pause before you answer where are you from, the room where your old status didn’t translate, the tiredness that never quite matches your calendar.

Tell me about your in-between in the comments. (I read every one — and I suspect the rest of us will recognize ourselves in your story.)

And if this essay feels uncomfortably accurate, an Expat Orientation Conversation is a place to let someone else hold the map while you notice what your body has been doing on your behalf:

I hold a small number of Expat Orientation Conversations each month — 60‑minute, one‑to‑one, non‑clinical sessions for sense‑making and orientation, not therapy or coaching.

Together we look at how long‑term life abroad may be shaping your inner experience, find language for what has been hard to name, and gently sort what’s contextual from what’s personal before you decide what, if anything, you want to do next.

Let’s keep walking the edges together.

Onward,
Kay✨

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Who’s behind Edgewalkers Collective?

I’m Kay — Filipina American TCK (Third Culture Kid), 17 years in Spain, and a counsellor-in-training (CPCAB, UK). I spent over a decade working in inclusion and cross-cultural strategy, helping organizations bridge cultures. Now I’m training to offer something different: recognition-based support for expats and global citizens who are done being told they should feel lucky to be here.

• If you’d like a sense of what working together could look like, you can read more on the Work With Me page.

• If you already know you want to sit with this more regularly, you can upgrade to paid for monthly guided audios and quarterly pattern reports from my ongoing research interviews.

• If this work is useful and you’d like to support it another way, you can buy me a coffee.

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1. On migration and cultural bereavement: Bhugra D, Becker MA. Migration, cultural bereavement and cultural identity. World Psychiatry. 2005;4(1):18-24. PMCID: PMC1414713. On allostatic load and the cumulative "wear and tear" of chronic stress: McEwen BS. Protective and damaging effects of stress mediators: central role of the brain. Dialogues Clin Neurosci. 2006;8(4):367-381. PMCID: PMC3181832.

2. Achotegui J. Immigrants living extreme migratory grief. the ulysses syndrome. Int J Fam Commun Med. 2022;6(6):303-305. DOI: 10.15406/ijfcm.2022.06.00295. Med Crave Online.

3. Renner A, Schmidt V, Kersting A. Migratory grief: a systematic review. Front Psychiatry. 2024 Feb 16;15:1303847. DOI: 10.3389/fpsyt.2024.1303847. PMID: 38435975; PMCID: PMC10904569. NIH.gov.