Your Nervous System Is Talking. You Might Want to Listen.

It’s 2:47pm on a Wednesday and the fluorescent tube above your desk has developed a flicker. Not enough for anyone else to notice, apparently. But you can feel it behind your left eye, a tiny pulse of wrongness that’s been building since lunch. The colleague two desks over is eating an apple. You can hear every bite. Someone’s perfume arrived in the room before they did and hasn’t left. Your shirt label is touching your neck in a way that has slowly become the only thing you can think about.

You’re not dying. You’re not having a panic attack. You are, by every external measure, just sitting at your desk on a normal afternoon.

So why does it feel like your skin is on inside out?

The Invisible Tax

Here’s what nobody tells you about sensory overload: the worst part isn’t the overload itself. It’s the energy you spend pretending it isn’t happening.

The smile you maintain while someone talks at you in a room that smells like competing lunches. The way you say “no, I’m fine, it’s fine” when someone asks why you look tense. The elabourate performance of being a person who finds Tuesday unremarkable, when Tuesday has in fact been an assault course of sounds and textures and lights that your nervous system has been logging with the diligence of a particularly anxious accountant.

And then you get home and collapse, and you think: why am I so tired? I didn’t do anything.

You did, though. You did an enormous amount. You just did it invisibly, inside your own skull, and nobody gave you credit for it. Including you.

There’s a reframe that might be useful here, and I want to name it early because it changes the shape of everything that follows. Sensory overload isn’t a malfunction. It’s not your nervous system being dramatic or broken or weak. It’s information. Your body is telling you something specific and true about your environment, and the problem - the actual problem - is that you’ve been taught to ignore it.

So. What if you stopped ignoring it?

What Sensory Overload Actually Is (and Why Your Brain Does It Differently)

Sensory overload happens when your nervous system receives more input than it can filter and process at once. The result is overwhelm, shutdown, meltdown, or some deeply unpleasant combination of all three.

Every brain does filtering. That’s one of its primary jobs - taking the firehose of sensory data hitting you every second and deciding what matters. The hum of the fridge: irrelevant, discard. The sound of your name: important, surface it. For most neurotypical brains, this happens automatically and efficiently, like a well-trained spam filter.

For many autistic and ADHD brains, the filter works differently. More input gets through. The brain doesn’t habituate to background stimuli the way it’s expected to - the fridge hum doesn’t fade, the label doesn’t stop scratching, the flickering light doesn’t become invisible. This isn’t a sensitivity problem in the way people mean when they say “you’re too sensitive.” It’s a neurological difference in how signals are weighted and prioritised. And it goes both ways. Hypersensitivity means too much gets in - sounds are louder, lights are brighter, textures are more present. Hyposensitivity means not enough gets in - you might seek out intense flavours, loud music, deep pressure, because your system needs more input to register it. Many people experience both, sometimes in the same afternoon, sometimes in the same sense. The person who can hear a conversation through two walls but doesn’t notice they’ve been cold for an hour. The one who can’t tolerate a gentle touch on the arm but craves the weight of a heavy blanket.

Research on sensory processing differences, such as frameworks mapping people along axes of sensitivity and self-regulation strategy, can be useful - not because it puts you in a box, but because it gives you language for something you’ve probably been experiencing without words for decades. One thing worth untangling: sensory overload is not the same as anxiety, though they share a postcode and frequently turn up at the same parties. Anxiety is about anticipated threat. Sensory overload is about actual, present, measurable input exceeding your processing capacity. They amplify each other viciously, but they’re different mechanisms. Knowing which one you’re dealing with matters, because the responses that help are different.

What It Actually Feels Like (Which Is Rarely What People Expect)

When most people picture sensory overload, they imagine someone covering their ears in a crowded room. Visible distress. Obvious cause, obvious effect.

But for adults - especially late-diagnosed adults who’ve spent years building elabourate coping architectures they didn’t know were coping architectures - it often looks nothing like that.

It looks like irritability. Brain fog. Suddenly not being able to find words, as if someone’s unplugged your vocabulary. It looks like snapping at your partner over nothing, or going completely silent at dinner, or that specific kind of exhaustion that sleep doesn’t fix. It looks like leaving a party early and not knowing why, then spending the drive home constructing a narrative about social anxiety that doesn’t quite fit.

Consider a scenario that might feel familiar. A work conference. You’re managing - bright venue lighting, a lanyard that’s slowly abrading your neck, the particular acoustic horror of many people having separate conversations in a room with hard floors. By mid-afternoon you’re not tired exactly. Something else. Your thoughts have gone thick and slow. Someone asks you a simple question and you stare at them for slightly too long before answering. You excuse yourself, sit in a toilet cubicle for a few minutes doing nothing, go back out, and push through until 5pm.

Then you spend the next couple of days in bed, blinds drawn, unable to explain to anyone - including yourself - what happened. You weren’t ill. You weren’t hungover. You were, in the language of the community, experiencing a sensory hangover. The delayed crash that follows sustained sensory exposure, which gets misread as depression, laziness, introversion, or just being a bit pathetic about normal life.

If you’ve ever needed extended quiet time after a social event, you know exactly what I mean.

The cost of not having this language is enormous. Years of “what’s wrong with me?” when the answer was sitting right there, in the scratch of a label and the buzz of a light.

Why Your Triggers Feel Random (They’re Not)

Monday: the sound of someone chewing makes you want to leave the country. Thursday: you barely notice it. This inconsistency is maddening, and it’s the thing that makes people - including you - doubt whether your experience is real.

It’s real. And it’s not random.

Think of your sensory capacity as a bucket. Everything pours into it: sensory input, yes, but also emotional stress, physical tiredness, cognitive load, hunger, the effort of masking, that email you haven’t replied to, the fact that you slept badly. When the bucket is partially full, you can handle the chewing. When it’s already at the brim from everything else, the chewing is the drop that sends it over.

This is why the same stimulus can be fine one day and unbearable the next. Your threshold isn’t fixed. It shifts based on cumulative load. And for neurodivergent people, the bucket is often smaller to begin with, fills faster, and takes longer to empty.

Some triggers are obvious: loud noises, bright lights, crowds. But many of the worst ones fly under the radar. Interoception differences mean many neurodivergent people don’t register hunger until they’re already dysregulated - you’re not having a meltdown because of the email, you’re having a meltdown because you haven’t eaten since morning and your body forgot to mention it. Temperature is another stealth trigger. So is time pressure. And masking itself - the sustained cognitive performance of appearing neurotypical - is a significant, invisible drain on the bucket that rarely gets counted.

A sensory log can help. Not a clinical instrument, nothing fancy. Just a habit of asking, after a crash: what was happening before this? What had I already absorbed today? Over time, patterns emerge. Not because your triggers are logical in the way other people would recognise, but because they’re logical to your nervous system. Which is, after all, the one that has to live in your body.

Nobody else gets to tell you what should and shouldn’t bother you. If it bothers you, it’s data.

Working With Your Nervous System Instead of Against It

The goal here - and I want to be careful about this, because I’m not your therapist and I don’t know your life - isn’t to eliminate sensory overload. That’s not realistic, and frankly, the pursuit of it tends to create its own special kind of exhaustion. The goal is to stop treating your nervous system as an adversary.

When overload is happening or about to happen, reducing input is the most direct intervention. Leave the room. Put in earbuds. Sunglasses indoors - yes, really, and anyone who judges you for it can go and sit under the flickering fluorescent tube themselves. A familiar texture in your pocket. Cold water on your wrists, which does something almost embarrassingly effective to your nervous system. Stimming, which is regulation, not a behaviour to be suppressed or hidden.

But the more interesting work - the stuff that actually changes your relationship with your own senses over time - is structural.

It’s building decompression time into your schedule before you need it, not as crisis management but as maintenance. It’s telling the people who matter that you might need to leave the restaurant early and that this isn’t about them. It’s noticing your early warning signs - the jaw tension, the shorter sentences, the sudden inability to make decisions about what to have for dinner - and treating them as the useful signals they are, rather than evidence of personal failure.

It’s also, sometimes, adjusting your environment proactively. Requesting a desk away from the kitchen. Working from home on days when your bucket is already half-full from a bad night’s sleep. Wearing the clothes that don’t have seams in weird places, even if they’re not the ones you’re supposed to wear.

None of this is weakness. None of it is accommodation in the grudging, bureaucratic sense. It’s just… paying attention to what your body has been trying to tell you, possibly for years, while you were busy overriding it.

I don’t have a neat ending for this. Sensory overload doesn’t resolve into a tidy narrative where you find the right pair of noise-cancelling headphones and everything clicks into place. Some days will still be too loud, too bright, too much. The bucket will overflow at inconvenient times. You’ll snap at someone you love because a dog barked while you were already at capacity, and you’ll feel terrible about it, and that’s just - that’s the shape of it.

But there’s something that shifts when you stop asking “what’s wrong with me?” and start asking “what is my nervous system responding to right now?” It’s not a cure. It’s a different question. And different questions, in my experience, tend to lead somewhere more useful than the old ones.

Even if that somewhere is just a quiet room with the lights off for a while. Sometimes that’s enough.