Trauma is often thought of as something that happened, an event in the past. But for many people, trauma isn’t only a memory. It’s something that continues to live in the body, long after the original event is over. This article looks at what that means, and why it matters for how trauma is understood and worked with in therapy.

Trauma is not just what happened

When people think about trauma, they often think first about the event itself: an accident, an assault, a frightening experience, a loss. These events matter, of course. But trauma, in a psychological sense, isn’t only about the event. It’s about what happens inside a person as a result of it, and how that continues to shape their experience long afterwards.

Two people can go through similar events and be affected very differently. This isn’t because one person is stronger or weaker than the other. It reflects a complex interplay of factors: what resources and support were available at the time, what the event meant in the context of someone’s life and history, and how the nervous system responded in the moment.

The nervous system’s response

When we encounter something overwhelming, frightening, or threatening, the body responds automatically, before we have time to think. This is the well-known fight, flight, or freeze response: a rapid mobilisation of the nervous system designed to help us survive immediate danger.

Most of the time, once the danger has passed, the nervous system settles back down. The activation discharges, and the body returns to a state of relative calm. But sometimes, particularly when an event is overwhelming, ongoing, or happens when someone has no way to escape or fight back, this discharge doesn’t fully happen. The activation gets, in a sense, stuck.

The body keeps the score. Long after the mind has tried to move on, the nervous system can remain on high alert, as though the danger were still present.

How this shows up years later

This is why trauma can continue to affect people long after the events themselves are over, sometimes decades later. The nervous system doesn’t distinguish well between “then” and “now”. A sound, a smell, a tone of voice, a particular kind of situation, anything that resembles the original threat, even faintly, can trigger the same physiological response: a racing heart, a tightening in the chest, a sense of panic or dread, or conversely, a sense of shutting down, going numb, disconnecting.

People often describe this as feeling like an overreaction, and frequently feel ashamed or confused by it. “Why am I reacting like this? It was so long ago. It wasn’t even that bad.” But from the nervous system’s point of view, there is no “long ago”. The body is responding to what it perceives as a current threat, based on patterns laid down by past experience.

Trauma and memory

One of the distinctive features of traumatic memory is that it often doesn’t work like ordinary memory. Ordinary memories tend to have a narrative quality: a beginning, middle and end, a sense of “this happened, then this happened, and now it’s over”. Traumatic memories are often fragmented, sensory, and lack this sense of completion. They can feel like they are still happening, rather than something that happened in the past.

This is part of why simply talking about a traumatic event, in the sense of recounting facts, doesn’t always bring relief, and can sometimes feel retraumatising if it isn’t done carefully. The goal of trauma-informed therapy isn’t just to produce a coherent account of what happened. It’s to help the nervous system find its way back to a sense of safety, so that the past can become past.

Working with trauma in therapy

A psychodynamic approach to trauma takes seriously both the psychological and the bodily dimensions of traumatic experience. This means paying attention not only to what is said, but to what is happening in the room: shifts in breathing, posture, tone of voice, moments of disconnection or overwhelm.

It also means going at a pace that respects what the nervous system can manage. This is sometimes called titration: working with small, manageable amounts of activation at a time, rather than diving straight into the most difficult material. Over time, this allows the nervous system to build a different kind of experience: that it is possible to approach difficult material and come back to a state of relative calm, rather than being overwhelmed by it.

The relationship between therapist and client is particularly important in trauma work. For many people who have experienced trauma, especially relational trauma, trust itself can be difficult. A therapeutic relationship that is consistent, attuned, and reliable can, over time, become a different kind of relational experience, one that helps to rebuild a sense of safety in connection with another person.

Trauma is not a life sentence

One of the most important things to understand about trauma is that the nervous system is capable of change. The patterns that developed in response to overwhelming experiences were adaptive at the time, they helped someone survive. But they are not fixed. With the right support, and at the right pace, it is possible for the nervous system to update, to learn that the present is not the same as the past, and to find its way back to a greater sense of safety and ease.

This process takes time. There is rarely a quick fix for trauma, and progress is often not linear. But the capacity for change, even after experiences that have shaped someone for many years, is real.

If this resonates with you

If you recognise some of what’s described here, perhaps reactions that feel disproportionate to what’s happening now, or a sense of being on edge or shut down without quite knowing why, it may be worth considering whether earlier experiences are still influencing how you respond to the present. This isn’t a sign of weakness or failure. It’s how the nervous system works, and it’s something that can be understood and, with time, gently shifted.