What years on the ICU frontline taught me about burnout – and why exhaustion, low mood and feeling empty are all symptoms of the same hidden pattern.
I spent years thinking I had multiple problems. The ICU gave me one. CrossFit gave me another. Burnout gave me a third – and burnout was the one that eventually stopped me completely. Four months off work, unable to understand why I felt the way I felt, having given everything I had for so long that I didn’t know who I was without it.
It took me a long time to realise they were all the same thing – expressing itself in different directions.
The same is true for most people I speak to.
They’re not lazy. They’re not weak. They’re not failing at self-care.
They are people who have become exceptionally good at giving to everyone else. They just haven’t realised their nervous system has stopped receiving.
I know this from 13-hour shifts in the ICU. I know it from holding the hand of a user the same age as me while their family falls apart in front of my face. I know it from coaching CrossFit after a shift that would break most people.
What I eventually discovered changed the way I understand burnout completely.
It wasn’t a motivation problem. It wasn’t a rest problem. It wasn’t even a self-care problem.
It was one hidden pattern – a nervous system stuck in permanent output mode, unable to receive. That pattern is the root cause behind burnout. And almost nobody explains it that way.
What I See Every Day – In the ICU, and Everywhere Else
The people who end up feeling exhausted, drained and empty are usually the ones who have spent years showing up for everyone else.
They’re the ones who tried hardest, longest, and most quietly.
I work as a family liaison nurse in the ICU. Part of my role is to be the person between the user, the health professionals, and the family – to translate, to support, to absorb the emotions that have nowhere else to go. You become a shoulder to cry on. You become the face people look to when they don’t know what’s happening to someone they love.
In the ICU, I see this acutely. But I see the same pattern in the CrossFit athletes I coach, in the friends I speak to, and in the messages I receive from people who follow my work.
- The nurse finishing a 13-hour shift - having performed CPR, comforted a grieving family, and made hundreds of micro-decisions that affected real lives - who goes home and cannot switch off. Who lies awake not because she's thinking about anything specific, but because her body never got the signal that the day was over.
- The parent and caregiver - holding down a job, managing a household, looking after an elderly parent or a child with additional needs - who describes their life with a quiet devastation:
“I spend all day giving. By the end I have nothing left for myself. Nobody asks me how I’m doing. I feel invisible.”
- The high-performing professional - who built a career on showing up, delivering, never letting anyone down - who sits in a meeting and realises they feel nothing. Not stressed. Not sad. Just empty.
“I’m not living. I’m surviving.”
- The person who can't explain the low mood - who isn't in crisis, isn't falling apart, but hasn't felt like themselves in months. Who wakes up tired. Who finds things that used to bring joy now feel flat. Who tells people they're fine, because the alternative requires more energy than they have.
“I’m not sad. I’m just… empty.”
Lo que a ninguno de ellos se les había dicho era esto:
These are not four different problems. They are four symptoms of the same pattern – burnout expressing itself in four different lives.
Different lives. The same physiology underneath.
And it is far more common than most people realise. Research shows that 78% of family caregivers experience burnout symptoms weekly. 87% report chronic stress and anxious thoughts. Burnout rates among high-performing professionals have risen 65% in a single year – and the people most affected are rarely the ones who worked the least. Across the broader workforce, healthcare workers remain among the most severely affected of all.
But the statistics miss the most important part: why.
The System Nobody Explains
Here is something I wish someone had told me before my burnout.
Exhaustion, emotional depletion and low mood are not character flaws. They are physiological states.
When you are constantly giving – at work, at home, emotionally, physically – your nervous system runs in what researchers call sympathetic nervous system (SNS) dominance. The fight-or-flight state. On. Ready. Giving.
The SNS is designed for short bursts. A crisis. A deadline. An emergency. It is not designed to run continuously – hour after hour, shift after shift, year after year.
What happens when it does:
The body stays in high alert. Cortisol stays elevated. The immune system starts to suppress. Sleep becomes shallow. Emotional capacity narrows – you can function, but you can’t feel fully. The things that used to restore you stop working. And eventually, the emptiness arrives – not because you stopped caring, but because the system that was supposed to replenish you never got the chance to run.
The body is on the sofa. The nervous system is still at the office. That disconnect changes everything.
This is the pattern behind “exhausted at work, drained at home, feeling empty inside.”
Not three separate problems. One system – the nervous system – that has been running on output for so long that its capacity to receive, recover and replenish has quietly broken down.
Which left me with one question I couldn’t stop asking:
Is there a way to reach that system directly – and help it refill?
“I’ve Tried Everything.” Most People Have. Here’s What’s Missing.
I want to say clearly: everything most people try for exhaustion and low mood has genuine value.
After my burnout, I tried most of it myself.
- Terapia - genuinely transformative, and I still go. But it requires appointments, consistency, and the mental bandwidth to go deep. For caregivers who put everyone else first, booking a therapy appointment can feel like an act of guilt.
- Meditación - I was not good at meditating. Because when your nervous system is in sympathetic overdrive, stillness doesn't feel restful - it feels like the moment everything you've been holding arrives at once. It requires a baseline of calm that depleted people often don't have.
- Exercise, journaling, supplements, late-night TV - I've tried all of them. Some help on good days. But they all require something first: time, quiet, mental space, the right environment. And that's exactly what people running on empty have already run out of.
The problem isn’t that these things don’t work. It’s that they all work at the level of symptoms – not at the level of the system producing them.
What I needed was something that worked without requiring me to first have something I didn’t have.
The Question That Changed Everything
By the time I came back from burnout, I had stopped asking: “What else should I be doing?”
Y empezó a preguntar: “What system is supposed to replenish me – and why has it stopped working?”
Esa pregunta me llevaba de vuelta al mismo lugar.
Al nervio vago (vagus is Latin for “wandering” – it runs from the brainstem all the way through the chest and abdomen, connecting the brain directly to the heart, lungs, gut and immune system).
It is the longest nerve in the body. And it is the primary pathway through which the nervous system shifts from sympathetic output into parasympathetic (PNS) recovery – rest, digest, restore, replenish.
Think of vagal tone (la medida de lo bien que funciona el nervio vago) as the body’s capacity to recover.
When the vagal tone is healthy, the body moves between states fluidly. You give. The demand passes. The vagus nerve activates. Cortisol drops. Emotional capacity restores. You sleep deeply. You wake with something left. The body becomes capable of receiving again.
But when that system has been under pressure for years – from emotional output, sustained overload, accumulated stress – that shift stops happening. The body stays in output mode. The system that enables recovery stops functioning as it should. Not because you aren’t resting. Because the signal telling it to reset is no longer getting through.
Is there a way to reach that system directly? That was the question.
Lo que encontré - Y por qué fui escéptico
As a nurse, I approach health claims with scientific scepticism. I need to see the evidence.
When I first came across research on vagus nerve stimulation (VNS), my first question was: where are the randomised controlled studies?
The established scientific approach was surgical – a device implanted in the chest, wired directly to the nerve. Used for t therapy-resistant depressive states. Not relevant to someone trying to get through a week of shifts without falling apart.
Entonces encontré algo que no esperaba.
Researchers had identified a branch of the vagus nerve that runs just beneath the surface of the skin – at the outer ear, at a small piece of cartilage called the trago. Functional MRI (fMRI) studies confirmed that stimulating this location activates the same brainstem pathways as surgical VNS.
This is the only scientifically established external location on the body where the vagus nerve can be reached directly – without surgery, without a prescription, without a healthcare appointment.
The technique is called transcutaneous auricular vagus nerve stimulation (taVNS – “transcutaneous” meaning through the skin, “auricular” meaning via the ear). Low-level electrical signals. No needles. No clinic. No preparation.
I went through the published research. Peer-reviewed, placebo-controlled studies – across 150+ internationally recognised research institutions, 60+ completed scientific studies, recommended by 1,000+ healthcare professionals.
The more I read, the more one thing kept surprising me. We spend years trying to change our thoughts, our habits, our routines. Yet almost everything I was reading kept pointing back to the same system underneath all of them.
That was when I stopped asking whether it sounded plausible and started looking at the data.
I wasn’t looking for another self-care ritual that required environment I didn’t have.
I wasn’t looking for something that asked more of people who had nothing left.
I was looking for something that worked at the level of the system itself. And this was the first thing I found that did.
Pero todavía había un problema.
The research was clear. What I needed was a device I could actually use – on a hospital break, in a gym bag, without a clinic visit, without thirty minutes of preparation.
Lo encontré. Y fue más sencillo de lo que esperaba.
Lo que muestra la investigación
Before I started sharing this with anyone, I needed to see whether the evidence mapped to what I had been observing.
I wasn’t looking for one impressive statistic. I wanted to see whether different studies were pointing in the same direction.
| Resultado | Métrico |
| −45% | Estados depresivos / estado de ánimo bajo (estudio de 10 días) |
| −35% | Pensamientos de ansiedad (10-day placebo-controlled study, sustained one month post-therapy) |
| −48% | Cansancio |
| +30% | Calidad del sueño |
| +61% | Actividad del nervio vago (dentro de los 5 minutos de uso) |
| −78% | Marcadores inflamatorios IL-6 (estudio de 3 meses) |
Más de 60 estudios científicos completados. Hasta la fecha, no se han reportado eventos adversos graves.
What struck me wasn’t any single number. It was that the improvements kept showing up across different symptoms that people often think are unrelated.
Depressive states dropping. Anxious thoughts reducing. Tiredness lifting. Sleep deepening. All through one intervention – because they all share the same underlying system.
The three things in the headline of this article – exhausted at work, drained at home, feeling empty inside – are all here. Not as coincidences. As one connected pattern with one shared root.
El dispositivo que produjo estos resultados se llama Nurosym.
The Daily Habit That Fits Inside the Life You Actually Have
Nurosym is a CE-marked taVNS device developed by Parasym – a UK-based company with more than 10 years of R&D and over £10 million invested in scientific research. Backed by 150+ internationally recognised research institutions, 60+ completed scientific studies and 100+ ongoing. Recommended by 1,000+ healthcare professionals. Over 5 million sessions completed.
Utiliza tecnología patentada Tecnología AVNTTM (Auricular Vagal Neuromodulation Therapy – a precisely calibrated electrical signal delivered through the tragus of the left ear, directly stimulating the auricular branch of the vagus nerve).
In practical terms: it clips onto the ear with a small cable – discreet, lightweight, and simple.
Cómo funciona
Nurosym is not a replacement for therapy, rest, or any other approach that is already helping. I still do all of those things.
What it adds is something different. It doesn’t require you to be in the right state first. It doesn’t need a cleared schedule or a quiet room. It works during the day you already have – not the one you planned.
It aims to activate the vagus nerve directly – supporting the shift from sympathetic output into parasympathetic recovery, without asking anything of you first.
In other words: it works at the level of the system itself – so that everything else you’re already doing can actually land.
How I actually use it
I carry my Nurosym in whatever bag I have – my work bag, my training bag. It goes everywhere I go, like I pack my lunch.
At work, I use it on my 15-minute morning break. Instead of reaching for another coffee – which I know makes things worse on a long shift – I sit in what we call our wobble room and I use it while I read or just sit quietly.
If I don’t get to use it in the morning, lunchtime works just as well. On training days, I use it between sessions or while I’m eating. At home, it can be while I’m reading, ironing, washing up – anything that doesn’t need both hands. It can go in a pocket. It fits around whatever the day actually brings.
It is, as I once described it, methodical but never rigid. Recovery finally started fitting into the life I already had.
Looking back now, I think this was the biggest thing I misunderstood. You can’t pour from an empty cup. And you don’t refill it by trying harder. Your nervous system needs a direct signal – not more effort.
What Changes – And What People Around Me Notice
The changes don’t arrive all at once. They arrive quietly – and then one day you realise something has shifted.
In fact, I almost missed them.
“I noticed I was calmer. Not performing calm. Actually calm.”
“The low mood that had just been there for months started to lift. I didn’t notice at first. My boyfriend noticed.”
“I stopped waking up already braced for the day.”
“For the first time in years, I had something left at the end of the day.”
These are the signals of a nervous system beginning to regulate – and something starting, slowly, to come back online.
Why Exhaustion and Low Mood Are Rarely the Only Things That Shift
Something I didn’t expect – and that most people don’t expect either.
The same vagal tone suppression that produces emotional depletion also drives the tiredness that doesn’t lift with rest, the sleep that doesn’t restore, and the low mood that has no name and no obvious cause.
People who start using Nurosym for exhaustion notice – almost as an afterthought – that their sleep has deepened. That the background irritability has dropped. That there is, unexpectedly, something left at the end of the day that wasn’t there before.
This is not coincidence. It is the same system beginning to function again. When vagal tone improves, the capacity to restore improves – and multiple things begin to shift simultaneously, because they were all coming from the same place.
¿Es esto correcto para ti?
If any of this is familiar – the giving that never stops, the emptiness that has no name, the approaches that help partially but never completely – this is worth exploring.
Una garantía de devolución del dinero de 30 días significa que no hay riesgo financiero. O hace una diferencia significativa - o la devuelves.
Nurosym puede valer la pena considerarlo si:
- You give everything at work and have nothing left when you get home
- You care for others - professionally or personally - and nobody is asking how you are
- Low mood, emotional flatness or a sense of emptiness has become the background of your life
- You've tried the obvious approaches and found them hard to sustain
- You're looking for something that fits into the 15 minutes you actually have - not the hour you don't
Nurosym is not suitable for everyone. If you have an implanted cardiac device such as a pacemaker, are pregnant, have had a serious cardiac event in the last five years, or are under 18, please do not use it. As with any new intervention, it is always worth checking with your healthcare professional first if you have an existing medical symptom.
If there is one thing I want you to take from this article, it is this:
The exhaustion you feel is not a sign that you are failing. The emptiness is not a sign that something is broken beyond repair. They are signs that a system designed to replenish you has been running on output for too long – and has not been given what it needs to receive.
You cannot think your way out of a body that still believes it is under threat.
But you can begin reaching the system underneath it.
In 15 minutes. In a break room. In the day you actually have.
This article reflects my personal experience and my evaluation of the available scientific evidence. I may receive a referral arrangement from purchases made through links in this article. I only recommend approaches I use myself and have examined carefully. This is not medical advice – always consult a qualified healthcare professional before starting any new intervention. Figures reflect relative change in peer-reviewed studies in specific study populations; individual results may vary.
– Olivia Tompkins, Cardiothoracic ICU Nurse, CrossFit L1 Coach & Wellbeing Advocate | London
Este artículo de blog tiene como objetivo ser informativo y no debe reemplazar el asesoramiento profesional en salud. Consulte siempre con un profesional de la salud para obtener asesoramiento personalizado.
Referencias
- Verbanck P, et al. Transcutaneous auricular vagus nerve stimulation (taVNS) effects on tiredness, mood and autonomic function. Parasym Ltd peer-reviewed data. 2021.
- Zheng S, et al. Transcutaneous auricular vagus nerve stimulation reduces anxious thoughts: placebo-controlled study. Estimulación cerebral. 2024.
- Dolcini J, et al. Effects of taVNS on sleep quality and widespread pain: randomised controlled trial. Parasym Ltd. 2025.
- Breit S, et al. Vagus nerve as modulator of the brain-gut axis in psychiatric and inflammatory disorders. Las fronteras de la psiquiatría. 2018;9:44. https://doi.org/10.3389/fpsyt.2018.00044
- Kaniusas E, et al. Current directions in auricular vagus nerve stimulation: a physiological perspective. Frontiers in Neuroscience. 2019. https://doi.org/10.3389/fnins.2019.00854
- Farmer AD, et al. International consensus on minimum reporting standards for transcutaneous vagus nerve stimulation research. Frontiers in Human Neuroscience. 2021. https://doi.org/10.3389/fnhum.2020.568051
- Redgrave J, et al. Safety and tolerability of transcutaneous vagus nerve stimulation in humans: systematic review. Estimulación cerebral. 2018;11(6):1225–1238. https://doi.org/10.1016/j.brs.2018.08.010
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