Why are some things traumatic but others aren't?
Trauma isn’t just about what happened. It’s how your system learnt to respond.
A few weeks ago, I rage-cried over a relatively innocuous email—from someone I didn’t even know. Was it clumsy? Yep. A strange tone? Definitely. An odd comment? Absolutely. But I felt white-hot and my heart was pounding as if they’d reached through the screen and insulted everything about me.
It felt like I had been challenged to a duel. In the middle of it, a small part of me noticed what was happening: Wow, this is affecting me a lot—why am I feeling this so strongly? I live with trauma, mental and chronic illness, so this kind of response isn’t unfamiliar—but it still catches me off guard sometimes. I opened chat windows to vent to my husband and a couple of close friends.
They understood, of course—why this had touched a nerve, why my brain works the way it does. But rationally, we all knew the truth: I was making a sabre-toothed tiger out of a kitten. Well, maybe a fully grown cat if I’m honest, but a cat all the same. Either way, my nervous system wasn’t about to start producing proportional responses that day.
By the end of it, I’d cried, ranted, and crawled into bed completely depleted.
Over. An. Email.
That’s the thing about trauma responses—they rarely feel rational, but that doesnt stop them from feeling real. It’s trying to convince everyone that your house is on fire, but no one else can see the smoke.
I know the word trauma is overused, and yes, I also know we’ve all seen Instagram posts about trauma that make us cringe. It’s no wonder many people grow sceptical of the concept altogether. In popular discourse, trauma is often used loosely to describe anything from serious injury to emotional stress.
But in psychology and neuroscience, trauma has a more specific meaning. It doesn’t refer simply to exposure to something difficult or distressing, but to the lasting physiological and psychological responses that occur when an experience overwhelms the nervous system’s ability to process or integrate it.
What do we mean by ‘Trauma’?
Trauma is not defined solely by the nature or severity of an event, but by its impact on your internal systems. In clinical psychology and psychiatry, trauma is typically understood as a condition in which an overwhelming experience leads to the following being prolonged:
• Physiological arousal (e.g., feeling constantly on edge, having a racing heart or tense muscles);
• Disrupted affect regulation (e.g., sudden emotional outbursts, shutting down emotionally, or struggling to calm down);
• Alterations in memory processing (e.g., vivid flashbacks, gaps in memory, or difficulty making sense of past events);
• Impaired self-other integration (e.g., feeling disconnected from yourself, having trouble trusting others, or struggling with identity and boundaries).
Crucially, trauma is context-dependent. Factors such as the timing of the exposure, available social support, prior adversity, and your individual neurobiological sensitivity all influence whether an event becomes traumatising.
This variability explains why some people may recover from major adversity with little long-term disruption, while others develop persistent trauma-related symptoms—even after something that seems, from the outside, relatively minor.
Trauma involves intense activation of survival circuits—fight or flight—and often leads to long-term disruptions in nervous system regulation if the experience can’t be processed or resolved. These states are rooted in evolutionary mechanisms designed to preserve life under threat. But when they persist beyond the immediate danger—when the body keeps reacting as if the threat is still present—they start to impair how we think, feel, and function.
These survival responses have been proposed to include not only fight and flight, but also freeze and appease (sometimes called fawn) behaviours—concepts drawn from evolutionary biology and expanded in some clinical models. If you’ve ever found yourself frozen mid-email, or panicking over a message you logically know is harmless, this may sound familiar.
What distinguishes trauma from stress is the loss of perceived control, safety, or integration. Stress can be acute and manageable—even beneficial in the right context. Trauma, on the other hand, involves a breakdown in your system’s ability to return to baseline.
Not all stress is traumatic, and not all adversity leads to traumatisation—but trauma leaves a signature that lingers, often unconsciously, in how we relate to the world, ourselves, and others.
What your system has learnt to expect
I’ve had to learn that trauma isn’t about whether something should feel threatening—it’s about what your system has learnt to expect. My own nervous system was shaped in an environment that felt, even at baseline, combative. I grew up with the sense that everyone was moving through life versus everyone else. Safety felt conditional. That shaped me—not just psychologically, but biologically.
So now, when I get a poorly worded email and my body reacts as though I’ve been attacked, it’s not irrational, it is a pattern. My nervous system is doing what it was trained to do: detect unsafety and respond before the danger arrives.
Understanding this hasn’t made the reactions disappear—but it’s made them less mysterious, less shameful and more workable.
Because your nervous system doesn’t just reflect you. It reflects everything you’ve lived through—and everything your parents and even grandparents may have had to adapt to. It carries traces of the social structures, cultural scripts, and relational dynamics your family may have contended with for generations.
Sometimes through stories. Sometimes through coldness or silence. Sometimes through biology itself.
Your reactions make sense in context.