Trauma: What It Actually Is and Why It Stays
- Dr Erin Reid

- Oct 26, 2025
- 3 min read
Trauma is a word that has found its way to the centre of the cultural lexicon. It is regularly spoken as part of our contemporary psychological vocabulary, and in certain contexts has become a ‘catch-all’ for any difficult experience. This has had an unintended effect of making people reluctant to use it for experiences that genuinely warrant it.
There is a tendency to disqualify one’s own experience: it was ‘not that bad’, others have ‘had it worse’, what happened ‘does not count’ as trauma.
What trauma actually is
Trauma is not defined by the event itself but by the impact of the event on our nervous systems. An experience becomes traumatic when it overwhelms our ordinary capacity to cope and integrate the experience. When what happens is too much, too fast, or too unexpected, the mind and body are unable to fully process what has happened in the moment. What is left after an experience is not a memory in the ordinary sense but something more like an unprocessed fragment: a piece of experience that has not quite been integrated into the narrative or bodily experience of the self. Events and experiences therefore remain active in the mind and body, rather than processed and filed into the past.
This is why trauma symptoms (intrusive memories, hypervigilance, avoidance, emotional numbing) are not signs of weakness or irrationality. They are our nervous system’s attempts to protect us against a threat that it has not yet registered as being over. The body does not realise that the event has ended and it continues to respond as if it is ongoing.
Big T and small t trauma
Clinical literature distinguishes between what is sometimes called big T trauma (a single, overwhelming event such as an accident, physical or sexual assault, disaster, or witnessed violence) and small t trauma. So called ‘Small t traumas’ refer to experiences that individually may be perceived as ‘less dramatic’ but cumulatively become extraordinarily significant. For example, chronic emotional neglect, persistent criticism, repeated experiences of humiliation or powerlessness, or growing up in an environment of chronic unpredictability or threat.
Small t trauma is often harder for people to identify in their lives because there is no one event to point to. You may not recognise your experience as traumatic at all. For you, it was perhaps ‘simply how things were’. But the impact on the nervous system, and on the patterns that develop in response (in childhood and through adolescence and adulthood) can be as significant as any single dramatic event.
Why it stays
Trauma persists because the usual processes of memory consolidation (the way that our brains file and integrate experiences) are disrupted by overwhelming levels of stress. Traumatic experiences are stored differently to ordinary memories: they are more fragmented, more sensory, more easily activated by cues that remind us of the original situations. A smell, a tone of voice, or a physical sensation can all activate a traumatic memory recurring in the present, with an immediacy that bypasses our rational understanding.
Avoidance of our trauma triggers tends to maintain rather than resolve our traumas. Our natural response to painful material is to stay away from it, but staying away prevents the processing that would allow the traumatic events or experiences to become genuinely past rather than perpetually present.
What therapy can offer
Therapeutic approaches to trauma have developed significantly in recent decades, and there are now well-evidenced methods for working with traumatic material in ways that are both effective and carefully paced. Good trauma therapy does not require revisiting the most painful material in graphic detail. It requires creating the conditions in which the nervous system can gradually process what it was not able to process at the time.
If you are carrying something that feels as present as it did when it happened, whether it is a specific event or a longer history, and you would like to explore whether therapy might help, you are welcome to get in touch.
Dr Erin Reid is a counselling psychologist offering online therapy to individuals, couples, adolescents, and families across the UK and internationally. Visit drerinreid.com to find out more.







