Is FND "all in my head" or am I imagining it?

No. The symptoms are real and involuntary — you are not imagining, exaggerating or faking them. FND is a recognised problem with how the nervous system functions.

If my MRI and other tests are normal, why do I still have symptoms?

Because FND is a problem of functioning, not structure. Scans of the "hardware" can look normal while the "software" — how signals are sent and received — is not working properly. Normal tests often help confirm FND rather than rule it out.

How is FND diagnosed?

By a neurologist, using positive clinical signs such as Hoover’s sign or tremor entrainment — it is a diagnosis made on positive features, not just a diagnosis of exclusion.

Was my FND caused by stress?

Sometimes stress, trauma, or a physical illness or injury contributes — but not for everyone. Many people with FND have no such history, so it should not be assumed to be purely psychological.

Yes — many people improve with a tailored multidisciplinary approach: understanding the diagnosis, physiotherapy, psychological therapy such as CBT where helpful, and treating any associated anxiety, depression or pain. Speak to a doctor or neurologist about a plan suited to you.

Functional Neurological Disorder (FND) in Singapore

Written & reviewed by the BestDoctors.sg editorial team · Last updated 1 Sep 2026 · General information, not medical advice

Quick answer. Functional neurological disorder (FND) is a condition in which there’s a problem with how the brain and nervous system send and receive signals, rather than damage or disease in the brain’s structure. A useful analogy: the “hardware” (the brain and nerves) looks normal on scans, but the “software” – how the system functions – isn’t running properly. FND is genuinely disabling and its symptoms are real, involuntary, and not imagined, faked or “all in the head.” It is common – among the most frequent reasons people see a neurologist – and it is diagnosed by a neurologist on the basis of positive clinical signs, not merely by ruling everything else out. With the right tailored, multidisciplinary treatment, many people improve.

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In a medical emergency, or for severe or sudden symptoms such as breathing difficulty, chest pain, fainting or stroke signs, call 995 immediately.

FND is one of the most misunderstood conditions in medicine, and getting the explanation right matters – the symptoms are real, they are not your fault, and they can improve.

What FND is – function, not structure

In FND the problem is in the way the nervous system is working, not in its physical structure. There is no stroke, tumour or nerve damage causing the symptoms, yet the person genuinely experiences them. The nervous system is a network that constantly sends and receives signals to move the body, feel sensations and stay alert. In FND those signals are disrupted – the messages get scrambled or misdirected – so the body does not do what the person is trying to make it do, even though the underlying structure is intact.

The widely used analogy is a computer whose hardware is intact but the software has a fault: nothing is broken inside the machine, but a program is not running as it should. In the same way, the “wiring” of the brain and nerves is undamaged, but movement, sensation or awareness can go wrong. This matters because FND is a recognised medical condition in its own right – not a label for “nothing found” – and, importantly, it is a condition that can get better with the right treatment.

The symptoms are real – and involuntary

This is the most important point: FND symptoms are not imagined, exaggerated or faked, and they are not under the person’s control. People cannot simply “snap out of it.” The weakness, shaking or blackouts are happening to the person, not being produced by them. Authoritative sources emphasise that the symptoms are real, cause genuine distress and disability, and are not intentionally produced. Dismissive framing such as “it’s all in your head” is both inaccurate and harmful, and can delay the very treatment that helps. A clear, respectful, believed explanation is the foundation of recovery, because understanding what is happening – and what is not – is itself part of the treatment.

Symptoms it can cause

FND can look like almost any neurological condition, and symptoms vary a great deal from person to person. Common patterns include:

Limb weakness or paralysis – an arm or leg that feels heavy, unresponsive or “won’t obey.”
Tremor or other abnormal movements – shaking, jerks, spasms or unusual postures.
Difficulty walking – dragging a leg, unsteadiness, or the legs giving way.
Functional (non-epileptic) seizures or blackouts – episodes that can resemble epileptic seizures or fainting but are not caused by abnormal electrical activity in the brain.
Numbness or sensory changes – altered feeling, tingling or loss of sensation.
Speech or swallowing difficulties – slurred or halting speech, a sense of the voice not working, or trouble swallowing.
Visual symptoms – blurring, double vision or episodes of reduced sight.

A distinctive feature of FND is that symptoms often fluctuate – they may vary through the day, come and go, or change with attention and distraction. There are also characteristic features a neurologist recognises, which is why the condition can be identified on examination rather than by exclusion alone.

How FND is understood

The clearest way to understand FND is as a “software” rather than a “hardware” problem: the structure of the brain and nerves is intact, but the functioning is disrupted. Because the disruption is in how the system runs rather than in its physical parts, ordinary scans and tests can look normal even while the person is genuinely and severely affected.

FND can be triggered or worsened by stress, illness, injury or a physical event – for example a period of intense pressure, an infection, a fall, or an operation. But in many people there is no single cause, and often no history of stress or trauma at all. For that reason the condition should not be over-attributed to psychological factors. It is best understood as a genuine problem of brain functioning with several possible contributors, and – whatever the trigger – it is not the person’s fault.

Common overlaps – but FND is not simply anxiety

Other symptoms frequently accompany FND, including fatigue, chronic pain, “brain fog,” anxiety or low mood. These are common alongside the condition and deserve attention in their own right. However, it is important to be clear that FND is not the same as anxiety or depression, and having FND does not mean a person is anxious or that the problem is “stress in disguise.” Anxiety and low mood, where present, are treated as co-existing conditions that can make FND harder to live with – not as its explanation.

How it’s diagnosed

FND is a diagnosis made by a neurologist based on positive clinical signs – specific features found on examination – not simply because tests come back normal. Examples include Hoover’s sign (leg weakness that returns to normal when the person pushes down with the other leg) and the tremor entrainment test (a functional tremor changes or stops when the person copies a rhythm with the other hand). These signs are reliable pointers that the nervous system’s structure is working, even though the person cannot control the affected part in the usual way.

Tests such as MRI, EEG or blood tests may still be done, but their role is to exclude other conditions where needed – not to make the diagnosis by process of elimination. A normal scan supports the FND diagnosis rather than contradicting it. Finally, a clear, confident and believed explanation is itself part of treatment: understanding that the diagnosis is positive and definite, and that recovery is possible, helps the nervous system begin to relearn normal patterns.

Treatment – there is real hope

Treatment is individualised and multidisciplinary, and a tailored, coordinated approach works best. Depending on the person’s symptoms it may include:

Understanding the diagnosis – education about how FND works and why it happens is therapeutic in itself.
Specialist physiotherapy designed for FND – retraining movement, weakness and walking using techniques suited to functional symptoms rather than ordinary strengthening alone.
Occupational therapy – rebuilding day-to-day function, activity and independence.
Psychological therapies for some people – approaches such as cognitive behavioural therapy where they are helpful, particularly for functional seizures or where anxiety or low mood coexist.
Speech and language therapy – for speech and swallowing symptoms.
Treating co-existing anxiety, depression or pain – so these do not hold back progress.

Improvement is possible, and sometimes substantial. Outcomes are generally best with early, coordinated care and an engaged, well-informed patient. In Singapore, this kind of multidisciplinary neuroscience care – neurologists working alongside physiotherapy, occupational therapy, speech therapy and psychology – is available through hospital services such as the National Neuroscience Institute and other public and private centres. If you have persistent unexplained neurological symptoms, ask a doctor about assessment by a neurologist.

Living with FND – self-management and self-care

People often make the most progress when they become active partners in their own care. Helpful habits include learning your triggers and warning patterns, pacing activity so you neither push into a crash nor avoid movement altogether, practising the strategies your therapy team teaches between sessions, and looking after sleep, mood and general health. Reliable, plain-language information – from your care team and from resources such as HealthHub – can reduce fear and reinforce that the symptoms are real and treatable. Connecting with others who understand FND, and keeping supportive family or friends informed, can also make a real difference. Recovery is often gradual and may have ups and downs, and that is normal; steady, patient work with your team tends to pay off over time.

When to see a doctor – and when it’s an emergency

See a neurologist for assessment if you have persistent or unexplained neurological symptoms, so a proper, positive diagnosis can be made and treatment started. Because FND is a specialist diagnosis, it should never be assumed for a new or sudden change. Sudden weakness, face drooping or speech difficulty should be treated as an emergency – call 995, as this may be a stroke – and any new, rapidly worsening or first-time neurological symptom needs urgent medical assessment rather than being put down to FND. Having FND does not protect against other conditions, so new symptoms always deserve to be checked properly.

Related brain & nerve conditions

Sources

NINDS (NIH) / Mayo Clinic — functional neurological disorder (a problem of how the brain sends and receives signals; symptoms are real and not intentionally produced; triggers; when to see a doctor).
neurosymptoms.org (Prof. Jon Stone) / peer-reviewed reviews — positive-sign diagnosis (Hoover’s sign, tremor entrainment); FND among the commonest reasons to see a neurologist; multidisciplinary treatment.
SingHealth / National Neuroscience Institute (NNI), Singapore — multidisciplinary neuroscience services (neurologists with physiotherapy, occupational and speech therapy).

General information only. This guide is general information about a brain or nerve condition and is not a diagnosis or personalised medical advice. See a doctor — a GP or a neurologist — for assessment, tests and treatment. Call 995 for stroke symptoms (face drooping, arm weakness, slurred speech), a sudden severe “worst-ever” headache, a first or prolonged seizure, or a rapidly worsening loss of movement, consciousness or breathing.