Does FNSD Always Come From Trauma?
Understanding the relationship between trauma, the nervous system, and functional neurological symptoms
No—functional neurological symptom disorder (FNSD), also called functional neurological disorder (FND), does not always come from trauma. Trauma can be an important part of some people’s histories, but it is not required for the diagnosis. A person can experience FNSD without a history of abuse, a major traumatic event, or an identifiable psychological stressor (Hallett et al., 2022).
This distinction matters. Patients deserve an explanation that fits their experiences. Someone with a trauma history should have opportunities to address it when relevant. Someone who does not report trauma should not be pressured to uncover a hidden psychological explanation for their symptoms. In either situation, symptoms deserve careful assessment and appropriate treatment. PMC
Why has FNSD historically been associated with trauma?
FNSD was historically understood through theories of conversion: the idea that psychological conflict or distress could be expressed through physical symptoms. These theories strongly influenced how clinicians explained the condition.
Contemporary understanding is broader. Research examines interactions among brain systems involved in attention, movement, sensation, emotion, and the experience of control over actions. Psychological experiences may influence these systems, but no single psychological explanation accounts for everyone with FNSD (Hallett et al., 2022).
A comprehensive approach therefore considers biological, psychological, and social factors. Trauma may be relevant within that picture, but it should not become a predetermined explanation imposed on every patient. PMC
What does research actually show about trauma?
Research supports an association between FNSD and adversity at the group level. In a systematic review and meta-analysis, Ludwig et al. (2018) found that people with FNSD reported childhood maltreatment and stressful life events more frequently than comparison groups. However, the findings varied considerably across studies.
Crucially, all 13 studies that specifically assessed whether participants had experienced neither severe life events nor maltreatment identified some patients with FNSD who reported no such stressors (Ludwig et al., 2018).
These findings support two conclusions:
- Trauma and adversity can be relevant risk factors.
- Trauma and adversity are not universal features of FNSD.
An association also does not establish that trauma caused a particular person’s symptoms. Research comparing groups cannot, by itself, explain the origin of one individual’s condition. pubmed.ncbi.nlm.nih.gov
Researchers have also explored whether some people have a clinically meaningful trauma-related presentation of FNSD. In a study of 78 patients, Paredes-Echeverri et al. (2022) examined relationships among probable PTSD, childhood adversity, symptom severity, and physical health. Their findings supported further investigation of a possible trauma subtype.
This remains a proposed way of understanding differences among patients, rather than proof that FNSD is fundamentally a trauma disorder. The study was observational and cannot establish causation (Paredes-Echeverri et al., 2022). frontiersin.org
How is FNSD diagnosed if trauma is not required?
FNSD is diagnosed through clinical assessment and positive neurological findings that support the condition. It should not be diagnosed simply because someone has experienced trauma, has anxiety, or has normal imaging results.
For example, certain examination findings in functional weakness or functional tremor can demonstrate characteristic changes in how movement operates. These findings require interpretation by a clinician with appropriate expertise. Assessment also considers other conditions that may explain symptoms or coexist with FNSD (Aybek & Perez, 2022).
A trauma history is relevant to understanding the person and planning care. It is not a substitute for establishing the neurological diagnosis. Likewise, the absence of trauma does not invalidate an otherwise well-supported diagnosis. The BMJ
What else can be relevant to symptoms?
A useful clinical distinction separates factors that increase vulnerability, events that occur around symptom onset, and factors that may contribute to symptoms continuing.
An initial trigger might involve illness, injury, pain, or a stressful experience. The issues affecting recovery may be different from whatever happened at the beginning. Current management therefore emphasizes understanding the individual’s presentation and selecting appropriate psychological and rehabilitation treatments (Dworetzky & Baslet, 2025). PMC
Consider this hypothetical example: A person develops functional walking difficulties after an injury. They subsequently become frightened of falling and begin avoiding activities. Their treatment might address movement retraining, confidence, and participation. That formulation does not require assuming that an undisclosed traumatic experience caused the symptoms.
Another person might experience functional seizures alongside intrusive memories and substantial trauma-related distress. Their treatment plan could appropriately include assessment and treatment of PTSD.
These examples illustrate why the same diagnosis can lead to different treatment priorities.
Does benefiting from psychotherapy mean trauma caused the condition?
No. A treatment’s usefulness does not establish the original cause of an illness.
FNSD-focused cognitive behavioral therapy (CBT) can address present-day patterns involving symptoms, thoughts, emotions, and behavior. Depending on the person’s needs, treatment may involve identifying triggers, developing coping skills, examining frightening predictions, and gradually returning to meaningful activities. Trauma processing is not a required component of every CBT plan (Myers et al., 2021). pmc.ncbi.nlm.nih.gov
For example, a patient might worry, “If symptoms happen while I am out, I will not know what to do.” Therapy could focus on developing a practical response plan and rebuilding confidence. That work can be valuable regardless of whether the person has a trauma history.
Evidence also calls for realistic expectations. In the CODES trial, adding seizure-specific CBT to standardized medical care did not significantly improve the primary outcome of monthly functional seizure frequency at 12 months. It did improve several secondary outcomes, including psychosocial functioning and psychological distress (Goldstein et al., 2020).
The implication is that psychotherapy may help people manage symptoms and participate more fully in life, without necessarily eliminating symptoms or identifying a single underlying cause. pubmed.ncbi.nlm.nih.gov
When should trauma be addressed in treatment?
Trauma deserves attention when it is relevant to the person’s current difficulties and treatment goals. For someone with FNSD and PTSD, a clinician may consider an established PTSD treatment within a coordinated care plan.
Trauma-focused approaches have been studied in people with functional seizures and PTSD, including prolonged exposure therapy. However, the FNSD-specific evidence for these approaches is more limited than the broader evidence for treating PTSD. Clinicians should avoid presenting trauma treatment as a guaranteed way to resolve functional neurological symptoms (Myers et al., 2021). pmc.ncbi.nlm.nih.gov
A useful question is: “Are trauma-related symptoms affecting your life in ways you would like help with?” This invites collaboration without assuming that every neurological symptom represents unresolved trauma.
What does trauma-informed care mean?
Trauma-informed care is an approach to how care is delivered. It emphasizes respectful communication, sensitivity, and patient participation. It does not require assuming that every patient has experienced trauma or needs trauma-focused treatment.
A recent practical management review recommends incorporating trauma-informed principles into interactions with patients with FND (Dworetzky & Baslet, 2025). In practice, this can include explaining an examination before beginning, asking permission before sensitive questions, and giving the patient room to express concerns. PMC
For example, a clinician might say:
“Some people find that difficult experiences are relevant to their symptoms, and others do not. We can discuss your history at a pace that feels manageable and focus on what would help you now.”
This is an illustrative statement, not a quotation from a research source.
What if you do not have a trauma history?
You can say so directly. You can also ask your clinician:
- “What findings support my FNSD diagnosis?”
- “How does the proposed treatment relate to my symptoms?”
- “Can we focus on current difficulties and practical recovery goals?”
- “How will we measure whether treatment is helping?”
You do not need a particular life story to deserve thoughtful care. Whether trauma is central, peripheral, or absent from your experience, treatment should begin with your actual symptoms, circumstances, and priorities.
Daniel C. Powell, MA., LMFT, BCBA
References
Aybek, S., & Perez, D. L. (2022). Diagnosis and management of functional neurological disorder. BMJ, 376, Article o64. https://doi.org/10.1136/bmj.o64
Dworetzky, B. A., & Baslet, G. (2025). Functional neurological disorder: Practical management. Neurotherapeutics, 22(4), Article e00612. https://doi.org/10.1016/j.neurot.2025.e00612
Goldstein, L. H., Robinson, E. J., Mellers, J. D. C., Stone, J., Carson, A., Reuber, M., Medford, N., McCrone, P., Murray, J., Richardson, M. P., Pilecka, I., Eastwood, C., Moore, M., Mosweu, I., Perdue, I., Landau, S., & Chalder, T. (2020). Cognitive behavioural therapy for adults with dissociative seizures (CODES): A pragmatic, multicentre, randomised controlled trial. The Lancet Psychiatry, 7(6), 491–505. https://doi.org/10.1016/S2215-0366(20)30128-0
Hallett, M., Aybek, S., Dworetzky, B. A., McWhirter, L., Staab, J. P., & Stone, J. (2022). Functional neurological disorder: New subtypes and shared mechanisms. The Lancet Neurology, 21(6), 537–550. https://doi.org/10.1016/S1474-4422(21)00422-1
Ludwig, L., Pasman, J. A., Nicholson, T., Aybek, S., David, A. S., Tuck, S., Kanaan, R. A., Roelofs, K., Carson, A., & Stone, J. (2018). Stressful life events and maltreatment in conversion (functional neurological) disorder: Systematic review and meta-analysis of case-control studies. The Lancet Psychiatry, 5(4), 307–320. https://doi.org/10.1016/S2215-0366(18)30051-8
Myers, L., Sarudiansky, M., Korman, G., & Baslet, G. (2021). Using evidence-based psychotherapy to tailor treatment for patients with functional neurological disorders. Epilepsy & Behavior Reports, 16, Article 100478. https://doi.org/10.1016/j.ebr.2021.100478
Paredes-Echeverri, S., Guthrie, A. J., & Perez, D. L. (2022). Toward a possible trauma subtype of functional neurological disorder: Impact on symptom severity and physical health. Frontiers in Psychiatry, 13, Article 1040911. https://doi.org/10.3389/fpsyt.2022.1040911
