Trauma and the Body
Trauma is not just something that happens in the mind. It is held in the body, in chronic tension, disrupted sleep, heightened pain, digestive difficulties, and the ways you inhabit (or disconnect from) your physical self. Understanding these connections is a vital part of recovery.
If reading about trauma feels activating, consider pacing yourself. You may find it helpful to start with grounding and stabilisation, then return when you feel steadier. The window of tolerance can help you pace this.
Why Trauma Is Experienced in the Body
Many people who have been through traumatic experiences are puzzled by their physical symptoms. They may visit their GP repeatedly for unexplained pain, exhaustion, or digestive problems without connecting these to what they have lived through.
This disconnection is understandable but important to bridge. Trauma is fundamentally a physiological event. When the brain detects overwhelming threat, it activates the body's survival systems, flooding it with stress hormones, redirecting blood flow, tensing muscles, shutting down digestion, and altering immune function. These are not metaphors. They are measurable, physical changes designed to help you survive.
In a single, time-limited threat, these changes resolve once safety is restored. When trauma is severe, repeated, or unprocessed, the body may never fully receive the "all clear" signal. The autonomic nervous system remains stuck in a defensive state, chronically mobilised or chronically shut down, and the physical consequences accumulate over time.
The body continues to fight a battle that the conscious mind may have moved past. Understanding this connection opens the door to effective treatment.
Chronic Tension and Protective Posture
When the nervous system is stuck in a state of threat, the body braces itself. Muscles remain chronically tense, particularly in the jaw, shoulders, neck, back, and pelvic floor, as though perpetually preparing for impact.
This tension is not voluntary. It is the body's way of armouring against a blow that may never come but that the nervous system believes is imminent. Over time, chronic muscle tension produces pain, stiffness, headaches, temporomandibular joint (TMJ) problems, and restricted movement. Many people with trauma histories develop chronic pain conditions that have no clear structural cause but are entirely real.
Posture can also be affected. Some people unconsciously adopt protective postures: hunched shoulders, a concave chest, a tightly held stomach. These postures serve a defensive function. They make the body smaller, protect vulnerable areas, and reduce visibility. They are the body's memory of needing to be safe.
Approaches that work with the body directly (trauma-sensitive yoga, somatic experiencing, breathwork, and body-awareness practices) can help release chronic tension patterns. This is not about forcing the body to relax. It is about gradually communicating safety to a nervous system that has learned to brace. Grounding techniques can also help by bringing gentle, non-threatening awareness to the body in the present moment.
When the Nervous System Amplifies Pain
Trauma does not only cause pain through muscle tension. It can change how the nervous system processes pain itself, making it louder, more persistent, and more distressing.
Central sensitisation is a well-documented phenomenon in which the central nervous system becomes more efficient at producing pain signals. After prolonged stress or trauma, the threshold for pain perception lowers: stimuli that would not normally be painful become so (allodynia), and stimuli that would normally cause mild discomfort produce intense pain (hyperalgesia). The volume dial for pain, in effect, gets turned up.
This helps explain why conditions like fibromyalgia, chronic widespread pain, irritable bowel syndrome, and chronic pelvic pain are significantly more common among people with trauma histories. The pain is not "in their head." It is produced by a nervous system that has been recalibrated by prolonged threat to be more sensitive to all incoming signals, including pain.
Many people with chronic pain have been told, implicitly or explicitly, that their symptoms are not real or are exaggerated. A trauma-informed understanding recognises that the pain is entirely real, and that addressing the underlying nervous system dysregulation, alongside appropriate pain management, is the most effective path forward.
Sleep Disruption and Night-Time Hyperarousal
Sleep requires something that trauma fundamentally disrupts: the ability to let go of vigilance, to surrender control, and to trust that you are safe enough to be unconscious.
For people with unresolved trauma, the transition to sleep can feel dangerous. The quiet and darkness that are supposed to be restful instead provide the conditions in which intrusive thoughts, memories, and body sensations become louder. Without the distraction of daytime activity, the mind turns toward what it has been avoiding.
Common sleep difficulties in trauma include difficulty falling asleep due to hyperarousal, racing thoughts, or anxiety about nightmares; frequent waking during the night, often in a state of alertness; nightmares or trauma-related dreams that produce intense fear and disorientation upon waking; night sweats, teeth grinding (bruxism), and restless movement during sleep; and early morning waking with a jolt of adrenaline.
These difficulties are the predictable consequences of a nervous system that does not feel safe enough to stand down. The sympathetic nervous system remains partially activated even during sleep, producing lighter, more fragmented, less restorative rest.
Improving sleep in the context of trauma typically requires working with the underlying nervous system dysregulation rather than simply applying generic sleep advice. Trauma-focused therapy, alongside specific strategies for night-time safety and regulation, can gradually restore the body's ability to rest.
Gut, Immunity, and Chronic Stress
The gut and the immune system are profoundly affected by chronic stress and trauma, a connection that is increasingly well understood but still often overlooked in clinical practice.
The gut contains more than 100 million neurons (sometimes called the "second brain") and communicates constantly with the central nervous system via the vagus nerve. This is the gut-brain axis. When the nervous system is in a chronic state of threat, digestion is deprioritised. Blood flow is diverted away from the gut, motility is altered, and the balance of gut microbiota is disrupted.
Stress-related digestive symptoms (nausea, irritable bowel syndrome, bloating, constipation, diarrhoea, and abdominal pain) are extremely common in people with trauma histories. The gut is not merely reacting to stress. It is directly connected to the nervous system's threat-detection circuits.
The immune system is similarly affected. Chronic activation of the stress response produces sustained elevation of cortisol and inflammatory cytokines. In the short term, this is adaptive, preparing the body to fight infection in the event of injury. When sustained over months or years, chronic low-grade inflammation contributes to a range of health problems, including autoimmune conditions, cardiovascular disease, metabolic syndrome, and increased susceptibility to infection.
The ACEs (Adverse Childhood Experiences) research demonstrated a clear dose-response relationship between childhood adversity and adult physical illness, including heart disease, diabetes, autoimmune disease, and chronic pain conditions. This is the biological legacy of a stress response system that has been chronically activated since childhood.
When the Body Feels Distant
While some people with trauma histories experience their bodies as chronically tense and painful, others experience the opposite: a sense of disconnection, numbness, or absence from their physical selves.
This disconnection (sometimes called depersonalisation or somatic dissociation) is the nervous system's way of protecting against overwhelming physical or emotional pain. If the body cannot escape, the mind creates distance from it. People experiencing this state may describe feeling "floaty," as though they are watching themselves from outside, or as though their body does not fully belong to them. Physical sensations may be muted or absent entirely.
For people who experienced physical or sexual abuse, disconnection from the body may have been essential for survival. If the body was the site of pain, violation, or helplessness, it makes sense that the mind would learn to leave it. This dissociative strategy, while protective at the time, can persist into adulthood as a generalised disconnection from physical experience.
The consequences are significant. People who are cut off from their body may struggle to recognise hunger, thirst, fatigue, or illness until they become severe. They may have difficulty identifying emotions, since emotions are partly body-based experiences. They may be accident-prone because they are not fully present in their physical selves. And they may find it difficult to experience pleasure, comfort, or the safety of human touch.
Reconnecting with the body after trauma is a gradual process that must be done carefully. Forcing body awareness on someone who has needed to dissociate can be re-traumatising. Effective approaches, including sensorimotor psychotherapy, trauma-sensitive yoga, and grounding practices, work at the edges of awareness, gently inviting the person back into contact with their physical self at a pace they can tolerate, within their window of tolerance.
When the Body Is Constantly Monitored
At the other end of the spectrum from disconnection is hypervigilance toward body signals, a state in which every heartbeat, every twinge, every change in breathing becomes a source of alarm.
Interoception is the sense that detects internal body signals: heart rate, breathing, temperature, gut sensations, muscle tension. In a well-regulated system, interoception operates largely in the background, bringing relevant signals to awareness (hunger, the need to use the toilet) without generating anxiety.
After trauma, particularly medical trauma, health-related trauma, or trauma that involved bodily threat, interoception can become hyperactivated. The person becomes acutely and anxiously aware of internal sensations, interpreting normal physiological fluctuations as signs of danger. A slightly faster heartbeat becomes evidence of a heart attack. A stomach sensation becomes a sign of serious illness. The body becomes a source of threat rather than a source of information.
This can contribute to health anxiety, panic disorder, and persistent somatic symptom presentations. The person is not imagining their symptoms. They are genuinely experiencing heightened body signals. But the interpretation of those signals is coloured by a nervous system that has learned to read the body through a lens of threat.
Working with trauma-related interoceptive hypervigilance involves recalibrating the relationship between body sensations and perceived danger. This includes psychoeducation about the nervous system, gradual exposure to body-awareness practices in a safe context, and processing the underlying traumatic experiences that taught the body to be feared.
What "Trauma Stored in the Body" Actually Means
The phrase "the body keeps the score," popularised by Bessel van der Kolk's influential book, has entered common parlance. But what does it actually mean for trauma to be "stored" in the body?
It does not mean that a specific traumatic memory is lodged in a specific muscle or organ waiting to be released. That would be an oversimplification. What it means is that traumatic experiences produce lasting changes in multiple body systems, changes that continue to affect how the body functions, feels, and responds to the world.
These changes include: altered autonomic nervous system baseline (chronic sympathetic activation or dorsal vagal shutdown); changes in muscle tension patterns and postural habits; modification of pain processing thresholds (central sensitisation); disruption of the hypothalamic-pituitary-adrenal axis (stress hormone regulation); changes in immune function and inflammatory markers; alterations to gut microbiota and digestive function; and changes in brain structure and connectivity, particularly in areas involved in threat detection, memory, and self-regulation.
These are measurable, physical changes. They explain why talking about trauma is often necessary but not sufficient. If the body has been changed by trauma, the body needs to be part of the healing process. This is why effective trauma therapy increasingly incorporates body-based awareness, why approaches like EMDR work with the physical components of traumatic memories, and why somatic practices like yoga, breathwork, and movement are recognised as valuable adjuncts to psychological treatment.
Helping the Body Learn That the Danger Has Passed
If trauma has changed the body, then healing must involve the body. This does not mean replacing psychological therapy with physical interventions. It means integrating both.
Trauma-focused therapy: Approaches such as EMDR and trauma-focused CBT process traumatic memories at both cognitive and somatic levels. During EMDR, for example, clients are asked to notice what is happening in their body as a memory is being processed. As the memory resolves, the associated body sensations (the tightness, the nausea, the racing heart) typically diminish as well. This is the body receiving the signal that the event is over.
Grounding and stabilisation: Grounding practices help anchor the person in the present moment through sensory engagement with the here and now. They communicate safety to the nervous system by redirecting attention from internal threat signals to external, neutral stimuli: the feeling of feet on the floor, the temperature of water on the hands, the colours visible in the room.
Breathwork: Slow, controlled breathing, particularly with an extended exhalation, directly activates the parasympathetic nervous system and reduces sympathetic arousal. This is one of the most accessible and evidence-supported tools for regulating the body's stress response. It is about using the breath as a lever to shift the nervous system toward safety.
Movement and body-based practices: Trauma-sensitive yoga, walking, swimming, dancing, and other forms of mindful movement can help restore the connection between mind and body. The key quality is that these practices are chosen, paced, and safe. The person is in control of what their body does, which is itself a corrective experience for someone whose body was previously controlled by others or by overwhelming threat.
The therapeutic relationship: The experience of being with another person who is calm, attuned, and safe provides the nervous system with a model of regulation. Co-regulation (the experience of your nervous system being calmed by proximity to another regulated nervous system) is the foundation on which all other interventions build.
Your Body's Response Makes Sense
If your body has been carrying the weight of traumatic experiences through pain, tension, exhaustion, digestive problems, disconnection, or hypervigilance, it is because your body has been doing its best to keep you safe.
The physical symptoms of trauma are not separate from the psychological symptoms. They are the same response expressed through different channels. A racing heart and a flashback are both the nervous system reacting to unprocessed threat. Chronic pain and intrusive memories are both signs that the body has not yet received the message that the danger has passed.
Recovery involves helping the body, not just the mind, learn that it is safe. This takes time, patience, and often professional support. But the body's capacity for change is remarkable. Just as it adapted to threat, it can adapt to safety. The tension held for years can release. The nervous system stuck in overdrive can learn to rest.
If you are experiencing physical symptoms that you suspect may be connected to trauma, our specialist trauma psychologists can help you understand these connections and work with both mind and body toward recovery. You are welcome to get in touch to discuss how we might be able to help.
Written by a Principal Clinical Psychologist
This resource is written in a structured, evidence-informed style, drawing on established trauma research and clinical practice.
Author & review
Written by: Dr Aisha Tariq, Principal Clinical Psychologist
HCPC registered
Reviewed by: Illuminated Thinking clinical team
Last reviewed:
Important note
This page is provided for information and support. It is not a substitute for personalised assessment, diagnosis, or medical advice. If you are in immediate danger or feel unable to keep yourself safe, call 999 or go to A&E. For urgent mental health support, contact NHS 111 (option 2 in many areas) or your local crisis team.
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