Long Covid, ME/CFS, FND, chronic pain, trauma, burnout — these can look very different on the surface. For many people, the underlying nervous system mechanism may be strikingly similar. Here's what we understand about each one, and why the same approach appears to help across all of them.
At On the Mend, we work with people whose nervous systems appear to have become locked in a prolonged survival state. Whether the trigger was a viral illness, a traumatic event, accumulated stress, or something present for years in the background — for many members, the mechanism underneath looks strikingly similar. That's why the same approach may work across conditions, not just one.
Long Covid affects an estimated 2 million people in the UK. Symptoms persisting 12+ weeks after Covid-19 — often for years — span virtually every system in the body. Research increasingly suggests that autonomic nervous system dysregulation may be a central driver for many people.
For many people with Long Covid, the picture isn't primarily respiratory — it's neurological. The immune response to infection appears to dysregulate the autonomic nervous system for some people, leaving it stuck in a prolonged survival state. The fatigue, crashes, and hypersensitivity often follow from this. The symptoms are real and physiological — not a matter of mindset or psychology.
Myalgic Encephalomyelitis / Chronic Fatigue Syndrome has been recognised for decades — but suffered decades of being dismissed as psychological. The evidence is now clear that ME/CFS is not a psychological condition. Research points to measurable physiological abnormalities including autonomic dysregulation, mitochondrial dysfunction, and immune activation — though how these interact is still being understood.
Many people with Long Covid meet the diagnostic criteria for ME/CFS. The overlap in presentation is striking — both often appear to involve autonomic nervous system dysregulation, HPA axis dysfunction, and a nervous system that seems stuck in a chronic survival state. Our programme was built with both in mind from the start.
Functional Neurological Disorder involves real neurological symptoms — tremors, weakness, non-epileptic seizures, movement difficulties, sensory changes — that arise from disrupted nervous system function rather than structural brain damage. It affects more people than MS and Parkinson's combined, and remains widely misunderstood.
FND is now understood as a disorder of how the nervous system functions, not what it's made of. The brain generates real symptoms in response to a disrupted control mechanism — often linked to prior stress, trauma, or physiological overload. The symptoms are entirely real. The mechanism is functional, which means it responds to functional approaches.
Chronic pain — persisting beyond normal healing or with no clear structural cause — is one of the most common and least well-served conditions in medicine. Modern pain science increasingly shows that chronic pain is a nervous system phenomenon: the system has learned pain as its default response, regardless of tissue damage.
The pain is real — but in chronic pain, the nervous system has become sensitised, generating or amplifying pain signals independent of tissue damage. This is called central sensitisation. It's the same stuck survival mechanism we work with in fatigue conditions — just expressed through pain rather than fatigue. The body has learned danger, and keeps signalling it.
Trauma — whether from a single overwhelming event or accumulated over time — is not stored in memory alone. It lives in the body, in the nervous system's survival responses, in the muscular patterns and physiological states that were adaptive in the moment and never got the chance to complete. This is why talk therapy alone often isn't enough.
Many people with Long Covid, ME/CFS, and FND have a history of unprocessed trauma that primed the nervous system for dysregulation before the illness arrived. Addressing the physical and the traumatic together is often what shifts the pattern. Our therapists include specialists in complex PTSD and dissociation with backgrounds spanning NHS inpatient settings, The Priory, and The Kusnacht Practice.
Burnout, perfectionism, and chronic high performance can dysregulate the nervous system just as profoundly as a viral illness or a traumatic event — often more gradually, and often without a clear moment of collapse. The person still going to work, still delivering, still appearing capable on the outside — while running entirely on threat, adrenaline, and habit.
Years of high performance, perfectionism, or sustained stress teach the nervous system that threat is the baseline. The body stops being able to distinguish between genuine danger and ordinary demands. Rest stops feeling safe. Switching off feels impossible — not because of laziness or mindset, but because the system has learned that vigilance is survival. This is not a psychological problem. It's a physiological one.
Book a free 30-minute call. Tell us where you're at and we'll tell you honestly whether this is the right fit — and if not, we'll try to point you somewhere better.
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