Trauma-informed practice: the complete guide for everyday therapy

Some years ago, a woman came to her first appointment at the service I was working in, sat down, and stood straight back up again. The chair we’d given her faced away from the door. She didn’t say anything about it. She just stood, coat on, bag on her shoulder, for the whole of the introduction. It was only when a colleague swapped seats with her that she sat, and later told us she had nearly left in the first minute.

Nobody had done anything wrong, exactly. The chair was where it always was. But for someone who had spent years needing to know where the exits were, it was the first message our service sent her, and it said: you are not in control here.

That’s what trauma-informed practice is about. Not a special therapy, or a training certificate, or a poster in the waiting room. It’s about noticing that the ordinary ways we run services can either help people feel safe enough to get help, or quietly remind them of the times they weren’t safe at all. This guide covers what it means, the evidence behind it, and how to put it into practice in an ordinary week.

What we mean by trauma

The word is used so widely now that it’s worth being precise. The US Substance Abuse and Mental Health Services Administration (SAMHSA), whose 2014 framework underpins much trauma-informed work, describes trauma in terms of three Es:

• Event(s): something, or a series of things, that was harmful or threatening, physically or emotionally.
• Experience: how the person experienced it. The same event can be traumatic for one person and not for another.
• Effects: lasting effects on the person’s functioning and wellbeing, physical, mental, social or spiritual.

All three matter. An event alone doesn’t make trauma; what makes it traumatic is how it was experienced and what it left behind. That’s why two siblings can grow up in the same house and carry it very differently.

Single events and repeated ones

Trauma researchers often distinguish between single-incident trauma, such as an accident or assault, and repeated, prolonged trauma, often interpersonal and often beginning in childhood: neglect, abuse, domestic violence, living in a war zone. The second kind tends to affect more of a person’s life, including how they see themselves and how they relate to others. The World Health Organization’s ICD-11 now recognises complex post-traumatic stress disorder as a diagnosis, adding difficulties with emotion regulation, self-image and relationships to the core symptoms of PTSD.

How common it is

Very. In the World Mental Health surveys, which interviewed tens of thousands of adults across many countries, around 70% reported at least one traumatic event in their lifetime. Most people who live through something terrible don’t go on to develop PTSD; recovery is the most common outcome. But in mental health services, the proportion of people with significant trauma histories is much higher than in the general population.

The other landmark study is the Adverse Childhood Experiences (ACE) study, published by Vincent Felitti, Robert Anda and colleagues in 1998. Among more than 9,000 adults, they found that childhood adversities such as abuse, neglect and household dysfunction were common and strongly linked, in a dose-response way, to later physical and mental health problems.

What “trauma-informed” means

Trauma-informed practice is not a treatment for trauma. It’s a way of working, across a whole service, that takes account of how common trauma is and how it affects people, so that the service itself doesn’t cause more harm. SAMHSA summarises it in four Rs. A trauma-informed service:

1. Realises how widespread trauma is and understands paths to recovery.
2. Recognises the signs and symptoms of trauma in clients, families and staff.
3. Responds by building that knowledge into policies, procedures and practice.
4. Resists re-traumatisation, actively avoiding practices that echo past harm.

The most quoted summary is a single change of question: from “What’s wrong with you?” to “What happened to you?” It moves the focus from deficit to experience. Symptoms stop being evidence of brokenness and become understandable responses, often adaptations that once kept someone safe.

Trauma-informed, trauma-specific

It helps to keep two things apart. Trauma-informed practice is for everyone in a service, whatever their role and whatever the client is there for. Trauma-specific treatment, such as trauma-focused CBT or EMDR, is a particular kind of therapy for people with trauma-related conditions like PTSD. A receptionist can be trauma-informed. Only a trained therapist should be delivering trauma-focused treatment.

The core principles

Several frameworks set out the principles of trauma-informed practice. The two most widely used are SAMHSA’s six principles and the working definition published in England by the Office for Health Improvement and Disparities in 2022. They overlap closely.

Principle	What it asks of you
Safety	Physical and emotional safety, in the building, the room and the relationship. Predictability is a big part of it.
Trust and transparency	Being clear about what will happen and why, and doing what you say you’ll do.
Choice	Real choices about what happens, so people regain some of the control that trauma took away.
Collaboration	Doing things with people, not to them. Sharing power where you can.
Empowerment	Recognising strengths and building on them; treating people as experts in their own lives.
Cultural consideration	Understanding how culture, history, identity and discrimination shape trauma and recovery.

SAMHSA also lists peer support, recognising the value of people with lived experience in services. Many good trauma-informed services build this in through peer workers, service-user involvement and co-production.

Audit your own practice

Principles are easy to agree with and harder to live by. The audit below turns them into eighteen specific statements about your own work. Answer as you actually practise, not as you’d like to. The chart shows the shape of your practice and suggests where to start.

How trauma shows up in the room

Clients rarely arrive saying “I have a trauma history”. More often, trauma shows up sideways, in ways that are easy to misread as something else.

• Hypervigilance: scanning the room, sitting near the door, startling at noises, watching your face closely.
• Difficulty trusting: testing you, holding back, expecting to be let down or judged.
• Dissociation: going blank, seeming far away, losing track of the conversation, feeling unreal.
• Strong reactions to small things: a change of room, a late start or a firm tone, felt as a much bigger threat.
• People-pleasing: agreeing with everything, apologising a lot, never disagreeing. Sometimes called “fawning”, it can be a learned way of staying safe around powerful people.
• Avoidance: cancelling, arriving late, changing the subject whenever a topic gets close.
• Body responses: pain, tension, nausea or exhaustion that arrive with certain topics.

None of these, on its own, means someone has been traumatised. But together, and alongside a history, they’re worth understanding as protection rather than problems. A client who checks your face constantly may once have needed to read an adult’s mood to stay safe.

The window of tolerance

The psychiatrist Daniel Siegel coined the term window of tolerance for the zone of arousal in which a person can feel their emotions and still think, talk and stay present. Pat Ogden and colleagues developed the idea in their work on trauma and the body.

• Inside the window, people can experience strong feelings without being overwhelmed. This is where learning and therapy happen.
• Above it, in hyperarousal, they’re flooded: panic, anger, racing thoughts, flashbacks.
• Below it, in hypoarousal, they shut down: numbness, flatness, disconnection, dissociation.

Trauma tends to narrow the window, so people move out of it more easily and find it harder to get back. Much of trauma-informed practice comes down to two skills: noticing when someone is leaving the window, and helping them back into it. Try both in the simulator below. Send the client out of the window, then use grounding to bring them back, and notice that grounding works differently depending on which way they went.

Grounding that works

Grounding techniques bring attention back to the present moment, usually through the senses. A few that work in most settings:

• 5-4-3-2-1: name five things you can see, four you can hear, three you can touch, two you can smell, one you can taste.
• Orienting: slowly look around the room and name where you are, the date, the time.
• Feet and seat: press feet into the floor, notice the chair holding you up.
• Temperature: cold water on the wrists, a cool drink, holding something warm.
• Breathing, used carefully: slow breathing helps many people, but focusing on the breath can increase anxiety for some trauma survivors. Offer it as one option among several.

For hyperarousal, slower and calmer works best. For hypoarousal, people often need something more alerting: sitting up, moving, naming things out loud, a stronger sensory input.

Pacing and phases

In her 1992 book Trauma and Recovery, the psychiatrist Judith Herman described recovery from trauma as moving through three broad stages: establishing safety, remembrance and mourning, and reconnection with ordinary life. The idea of starting with safety and stabilisation has shaped trauma work ever since.

It’s worth knowing that this has become a debate. Some researchers argue that, for many people with PTSD, long stabilisation phases delay effective treatment unnecessarily, and that trauma-focused therapies can often begin sooner, safely, with good preparation. Most clinicians land somewhere in between: enough stability to tolerate the work, without waiting indefinitely for a perfect moment that never comes.

Whatever model you use, pacing within each session matters:

• Agree at the start what you’ll focus on, and how you’ll know if it’s too much.
• Check in during the session, not only at the end.
• Leave time at the end to come back to the present, especially after hard material.
• Agree a “stop” signal the client can use at any time, and honour it.

Asking about trauma

Many services now ask everyone about trauma routinely, as part of assessment. Done well, routine enquiry tells people it’s safe to talk about. Done badly, it can feel intrusive, or like being asked to perform pain for a form.

How to ask

• Explain why you’re asking: “Difficult experiences are common and can affect how people feel now, so I ask everyone.”
• Make it clear they don’t have to answer, and don’t need to give details.
• Ask in plain words, about specific experiences, rather than “Have you experienced trauma?”, which many people don’t apply to themselves.
• Headlines, not details, especially in a first meeting.

When someone tells you

• Thank them. “Thank you for telling me. I know that might not have been easy.”
• Believe them. Your job isn’t to investigate.
• Don’t push for more. Let them choose how much to say.
• Check how they are now, and whether anything is still happening that puts them or others at risk.
• Explain what happens next, including any safeguarding duties, honestly and in advance.
• Check in before they leave, and again at the next session.

The first appointment

For someone with a trauma history, a first appointment with a new service can be one of the most anxious moments in the whole process. Many of the things that make it feel safe or unsafe happen before you’ve said a word. Walk through a typical first appointment below and choose how your service does each step.

Language

The words we use about clients, in notes, letters and team meetings, shape how we see them and how they see themselves when they read their records. Language that frames trauma responses as character flaws (manipulative, attention-seeking, non-compliant) makes it harder for staff to stay curious and compassionate, and harder for clients to trust the service.

None of this is about being politically correct. It’s about accuracy. “Refused to engage” usually describes our experience; “didn’t feel safe enough to engage yet” is often closer to the client’s. Try reframing these common phrases.

Re-traumatisation: what to watch for

Services can unintentionally recreate the dynamics of past trauma: powerlessness, unpredictability, not being believed, having no say. Common culprits include:

• Being made to retell a traumatic history repeatedly to different professionals.
• Sudden changes of worker, room or appointment without explanation.
• Being touched, restrained or physically examined without clear consent and explanation.
• Strict rules applied without flexibility, such as discharge after missed appointments.
• Not being believed, or being treated as if their account is suspect.
• Locked doors, long unexplained waits, being talked about rather than to.
• Endings that are abrupt or unplanned.

A useful exercise for any team: walk through your service as if you were a new client with a trauma history. Read your letters, sit in your waiting room, listen to how people are called in. Notice where you would tense up.

Culture, identity and collective trauma

Trauma doesn’t only happen to individuals. Communities carry the effects of war, displacement, colonialism and persecution across generations. Experiences of racism, homophobia, transphobia and other discrimination can be traumatic in themselves, especially when repeated over a lifetime, and can make institutions, including mental health services, feel unsafe.

• Don’t assume. Ask how a person’s identity, culture and community relate to what they’ve been through and to what would help.
• Recognise mistrust as reasonable. Some communities have good historical reasons to be wary of services.
• Offer interpreters properly, ideally not family members, and allow extra time.
• Value cultural and faith resources as sources of strength and healing, not obstacles.
• Practise cultural humility: an ongoing willingness to learn, rather than a belief that a training day made you competent.

When to refer for trauma-focused treatment

Being trauma-informed doesn’t mean every therapist should treat trauma. If a client has PTSD or complex PTSD, they deserve access to treatments with good evidence. In the UK, NICE’s 2018 guideline recommends trauma-focused CBT and EMDR for adults with PTSD, delivered by trained practitioners.

Consider referral or specialist supervision when:

• Intrusive memories, nightmares or flashbacks are a major part of the picture.
• The client wants to work directly on traumatic memories and you’re not trained to.
• Dissociation is significant and you’re unsure how to work with it.
• Progress has stalled and trauma seems to be at the centre of it.

Until then, and alongside specialist work, trauma-informed care still matters. Stabilising, building safety and helping someone understand their reactions are valuable in themselves.

Looking after yourself

Hearing about trauma, week after week, affects the people who listen. In 1990, Lisa McCann and Laurie Anne Pearlman described vicarious trauma: lasting changes in a helper’s view of themselves, others and the world through empathic engagement with clients’ trauma. Related ideas include secondary traumatic stress, which can involve symptoms similar to PTSD, and compassion fatigue.

There’s a hopeful side too. Researchers have also described vicarious resilience: the way therapists can be positively changed by witnessing clients’ courage and recovery. Both can happen in the same person, sometimes in the same week.

• Mix your caseload where you can, so not every client is working on trauma.
• Use supervision for how the work affects you, not just case management.
• Notice changes in yourself: cynicism, numbness, intrusive images, a darker view of people.
• Build transitions between work and home.
• Organisations share responsibility. Self-care can’t fix unmanageable caseloads.

Trauma-informed organisations

One trained therapist can make a room safer. A whole service has to change to become trauma-informed. That usually means looking at:

• Policies: missed appointment rules, discharge criteria, how complaints are handled.
• Environment: waiting areas, signage, noise, privacy, lighting.
• Every role: receptionists, administrators and managers, not only clinicians.
• Lived experience: involving people who use the service in designing it.
• Staff wellbeing: supervision, workload, reflective practice.
• Review: asking clients regularly how the service feels to use, and acting on what they say.

Common misunderstandings

• “Everyone is traumatised.” Trauma is common, but not universal. Trauma-informed practice doesn’t assume a history; it makes the service safe whether or not there is one.
• “We should never talk about trauma.” Avoiding the subject can leave people feeling unheard. The aim is to talk about it safely, at the client’s pace.
• “It means no boundaries.” Clear, consistent boundaries are part of safety. Trauma-informed practice is predictable, not permissive.
• “It’s just being nice.” It’s more specific than that: understanding how trauma affects people and changing practice accordingly.
• “We did the training.” Training is a start. Change shows up in letters, rooms, rules and relationships.

Summary

• Trauma is common; how it’s experienced and what it leaves behind matter as much as the event.
• Trauma-informed practice is a way of working across a service, not a specific therapy.
• Its core principles are safety, trust, choice, collaboration, empowerment and cultural consideration.
• Learn to notice when clients leave the window of tolerance, and help them back.
• Pace the work, ask about trauma gently, and never require details.
• Small changes, like a letter, a greeting or a chair, send big signals about safety.
• Watch your language; it shapes how clients are seen and how they see themselves.
• Refer for trauma-focused treatment when it’s needed, and look after yourself and your colleagues.

The woman who stood through her first appointment came back the next week. She arrived early, walked into the room, and sat in the chair facing the door before anyone had said a thing. We never discussed it. We didn’t need to. The chair stayed there for every session after that, and for every new client who came after her.