FND Education Project

REFERENCE · BIOPSYCHOSOCIAL EXPERIENCE

Emotional Regulation, Irritability, and Overwhelm Around FND

This page covers: Strong emotions that rise quickly, irritability, feeling emotionally flooded, crying more easily, difficulty settling after an emotional response, or sometimes feeling emotionally shut down or disconnected.

Scope boundary: These experiences may occur in some people with FND, but anger or irritability is not a diagnostic sign of FND. Emotional processing is an active area of FND research; the findings are group-level, varied and do not show that emotional difficulty caused an individual’s FND. [1][2][3]

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For the Person With FND

What emotional regulation means

Emotional regulation is the nervous system’s ability to notice an emotional response, adjust to it and choose what to do next.

That does not mean suppressing emotion or remaining calm all the time. Anger, fear, sadness, frustration and excitement are ordinary human experiences.

The difficulty may be that the response becomes larger, faster or harder to stop than you expected, especially when you are already dealing with pain, fatigue, poor sleep, sensory overload, symptoms or several demands at once.

Some people describe:

  • becoming irritated much more quickly than they used to;
  • going from manageable frustration to anger very fast;
  • crying unexpectedly or being unable to stop once crying begins;
  • feeling overwhelmed when several people are talking or several things need attention;
  • needing much longer than expected to settle after a difficult interaction; or
  • the opposite pattern: feeling numb, detached or unable to tell what they are feeling.

These examples describe experiences. They do not prove that FND is the cause.

What does FND research actually show?

Researchers have studied emotional processing in FND, including emotional reactivity, emotional awareness, bodily responses to emotion and regulation. Reviews suggest that some group-level differences exist, but the studies are heterogeneous and do not identify one emotional profile shared by everyone with FND. [1]

FND research also examines networks involved in attention, salience, interoception, agency and emotion. These systems interact, but current models are not individual diagnostic tests and do not establish that a person’s neurological symptoms began because of emotional conflict or stress. [2][3]

A useful way to think about it is:

Emotion may be one part of the load on the nervous system, and FND symptoms may themselves create powerful emotions. The direction can go both ways.

A seizure, fall, episode of paralysis, pain flare or loss of speech can be frightening or frustrating. Repeated symptoms, disability, disbelief, lost roles and dependence on others can also affect mood and relationships. None of that requires emotion to have caused the original disorder.

Why might the threshold change?

Your ability to regulate a strong response can change from hour to hour.

Possible contributors include:

  • pain or migraine;
  • fatigue or reduced available capacity;
  • poor or fragmented sleep;
  • sensory overload;
  • hunger, illness or other physical strain;
  • anxiety, depression, trauma-related symptoms or another mental-health condition;
  • medication or substance effects, dose changes or withdrawal; and
  • the practical and emotional strain of living with chronic illness.

More than one can be present.

If irritability or emotional intensity changed after a medication was reduced or stopped, that timing is worth discussing with the prescriber. It should not automatically be labelled FND.

A low-demand plan for an emotional surge

This is not a treatment for every cause of irritability. It is a practical way to reduce harm while you work out your own pattern.

  1. Notice the first change you can reliably recognize. It might be a tight jaw, faster speech, heat, tears, difficulty finding words, an urge to argue, or simply the thought “I cannot take in one more thing.”
  2. Reduce one demand. Stop the extra conversation, lower noise, sit down, postpone one decision or ask for one person to speak at a time.
  3. Use an agreed pause. A pause is not the same as abandoning the discussion. Decide when or how you will return to it.
  4. Avoid proving a theory in the moment. The question “Is this FND, stress, pain or something else?” can usually wait until everyone is safer and calmer.
  5. Review later. Ask what was happening physically, cognitively, emotionally and socially before the threshold was crossed.
  6. Keep only what helps. If a strategy makes you monitor yourself constantly, increases distress or becomes another rule you can fail, change it.

Responsibility and explanation can both be true

A neurological or capacity problem may make emotional control harder. That can help explain why a reaction happened.

It does not mean that hurting, threatening or frightening another person becomes acceptable.

A useful plan protects both sides: reduce unnecessary demands early, allow a pause before escalation, and return later for repair or problem-solving when possible.

When to ask for reassessment

Seek clinical review when irritability, emotional intensity or behaviour is new, severe, rapidly worsening or very different from your usual pattern, especially when it appears with major sleep change, confusion, impaired judgement, medication or substance changes, new neurological symptoms or safety concerns.

Immediate help may be needed when there is danger to you or someone else.

Questions

What is the earliest sign that your emotional capacity is narrowing?

Which factors tend to be present on the days when your threshold is lower: pain, sleep, fatigue, sensory load, symptoms, conflict, medication changes or something else?

What short phrase could tell a supporter, “I need to pause this, but I am not abandoning the conversation”?

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Family, Friends, and Other Supporters

A rapid emotional response can be difficult for everyone involved.

If the person has an agreed early-warning plan, help use it before the conversation becomes harder. That may mean one person speaking at a time, reducing noise, postponing a non-urgent decision or using a familiar phrase such as, “We can come back to this.”

Do not diagnose the person’s emotion for them. “You are having an FND reaction” or “this is just anxiety” may be inaccurate and can turn a disagreement into a debate about illness.

At the same time, you do not have to accept unsafe behaviour because someone has FND. Keep ordinary boundaries around threats, intimidation, violence and safety. An explanation for reduced regulation is not the same as permission to harm.

When things are settled, describe what you noticed without assigning cause: “You were already in pain, the television was loud, and when we both started talking you seemed unable to take in more.” That gives the person useful information without deciding why it happened.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Clinicians and the Care Team

Keep diagnosis and formulation separate

Do not use irritability, crying, emotional reactivity, trauma history or difficulty regulating emotion as positive diagnostic evidence for FND.

The FND diagnosis should rest on the appropriate positive neurological features. Emotional processing can then be considered separately as part of formulation, disability, treatment planning or comorbidity when it is relevant to the individual. [1][2][4]

Assess what changed

Clarify:

  • baseline personality and emotional regulation before the current change;
  • temporal relationship to pain, migraine, sleep, fatigue and sensory load;
  • medication, substance or withdrawal effects;
  • anxiety, depression, PTSD, dissociation, ADHD or other relevant psychiatric/neurodevelopmental factors;
  • seizure, cognitive or autonomic symptoms around the episodes;
  • interpersonal and environmental demands; and
  • whether the main problem is emotional intensity, impulse control, communication, recovery time or another phenomenon.

A severe new change in behaviour should prompt proportionate medical and psychiatric differential assessment rather than automatic attribution to FND.

Match treatment to the actual target

Psychological treatment may be useful when the person wants help with emotion regulation, trauma, anxiety, depression, symptom fear, coping or interpersonal consequences. That does not mean psychotherapy is required to validate the FND diagnosis, nor does improvement with therapy prove a psychological cause. [4]

Occupational, rehabilitation, neurological and primary-care work may also matter when pain, sleep, medication effects, sensory load or activity demands are major contributors.

The aim is not compulsory calmness. A better target may be earlier recognition, safer communication, fewer escalations, quicker recovery, more participation or reduced distress.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

Research and Sources

What the evidence can and cannot support

Pick and colleagues reviewed research on emotional processing in FND and proposed a biopsychosocial research model. The literature included multiple emotional domains and heterogeneous methods. It supports studying emotion as one potentially relevant system, not treating anger, irritability or emotional dysregulation as universal FND symptoms or proven causes. [1]

Broader FND mechanism reviews discuss interactions among emotion, salience, attention, interoception, agency and motor control. These are research frameworks rather than individual diagnostic biomarkers. [2][3]

Psychological-management guidance supports individualized treatment targets and attention to comorbidity without requiring a psychological stressor to establish FND. [4]

Citation Full citation
[1] Pick S, Goldstein LH, Perez DL, Nicholson TR. Emotional processing in functional neurological disorder: a review, biopsychosocial model and research agenda. Journal of Neurology, Neurosurgery & Psychiatry. 2019;90(6):704–711. FND-CIT-0005. https://doi.org/10.1136/jnnp-2018-319201
[2] Hallett M, Aybek S, Dworetzky BA, McWhirter L, Staab JP, Stone J. Functional neurological disorder: new subtypes and shared mechanisms. The Lancet Neurology. 2022;21(6):537–550. FND-CIT-0003. https://doi.org/10.1016/S1474-4422(21)00422-1
[3] Drane DL, Fani N, Hallett M, Khalsa SS, Perez DL, Roberts NA. A framework for understanding the pathophysiology of functional neurological disorder. CNS Spectrums. 2021;26(6):555–561. FND-CIT-0006. https://doi.org/10.1017/S1092852920001789
[4] British Psychological Society. Functional Neurological Disorder: Neuropsychological and Psychological Management in Children and Adults. Briefing paper. 2024. FND-CIT-0078. https://doi.org/10.53841/bpsrep.2024.rep181

Page created: October 2, 2026 · Clinical, lived-experience and accessibility review pending