PIP for Functional Neurological Disorder (FND) - Can You Claim?

Functional Neurological Disorder (FND) causes real, disabling symptoms - seizures, limb weakness, tremor, speech difficulties, cognitive problems - that arise from the way the nervous system functions rather than from structural damage. Despite being recognised by the NHS as a genuine neurological condition, FND is still dismissed by some assessors as "psychological" or "not real." This makes your PIP application particularly important to get right.

Common FND Symptoms and Which Activities They Affect

Functional seizures (dissociative seizures): These are not epileptic seizures, but they are equally disabling. Loss of consciousness, falls, injury risk, post-seizure confusion and exhaustion. If you have functional seizures, you need supervision for safety during activities like cooking (Activity 1), bathing (Activity 4) and moving around (Activity 12). The unpredictability affects journey planning (Activity 11).

Limb weakness or paralysis: Functional weakness can be as severe as weakness from stroke. If your leg doesn't work, you can't walk. If your arm doesn't work, you can't cook, wash or dress independently. The affected activities depend on which limb and how severe, but the impact is real and measurable.

Tremor: Functional tremor makes handling objects dangerous - knives, hot liquids, buttons, zips. It affects food preparation (Activity 1), dressing (Activity 6) and writing or using a phone for communication.

Speech difficulties: Functional speech problems affect communication (Activity 7) directly. If you can't speak clearly or at all on the majority of days, this scores highly.

Cognitive difficulties (brain fog): Concentration problems affect reading (Activity 8), budgeting (Activity 10) and following conversations (Activity 9). Memory problems affect managing therapy (Activity 3).

Fatigue: FND-related fatigue is often severe and affects every activity through the reliability criteria - even if you can do something once, you can't do it repeatedly.

The "It's Not Real" Problem

Some assessors still treat FND as a psychological condition that patients could overcome if they tried. This is medically incorrect. FND is classified as a neurological condition by the WHO (ICD-11), NHS and all major neurological organisations. If an assessor dismisses your FND, challenge it at Mandatory Reconsideration with a clear statement: "FND is a recognised neurological condition. My symptoms are involuntary and not under my conscious control."

Fluctuation

FND symptoms often fluctuate dramatically - fine one hour, unable to walk the next. This doesn't mean you're faking. Describe the fluctuation clearly: "My symptoms are highly variable. On approximately 4 out of 7 days, my left leg is too weak to bear weight and I use a wheelchair. On better days I can walk short distances with a stick. I cannot predict which type of day I will have."

What Evidence Helps?

• Neurologist letters confirming diagnosis and functional impact
• Physiotherapist reports from FND-specific rehabilitation
• Occupational therapist reports
• Psychology or psychiatry letters if receiving treatment
• Seizure diary with dates, duration and recovery time
• Video evidence of seizures or symptoms (if you're comfortable sharing)
• Partner or carer statement

FND Subtypes - Match Your PIP Wording to Your Diagnosis

• Functional motor disorder (FMD): Weakness or paralysis, often unilateral. Distribution does not follow anatomical nerve patterns.
• Functional movement disorders: Tremor, dystonia, myoclonus, jerks, tics. Often variable with distraction.
• Functional/dissociative seizures (PNES): Non-epileptic attack disorder. Resembles seizures but EEG normal during episode.
• Functional cognitive disorder: Memory, concentration, word-finding issues with normal cognitive testing.
• Functional speech disorder: Dysarthria, stuttering, aphonia.
• Functional sensory disorder: Numbness, tingling, visual disturbances.
• Functional gait disorder: Abnormal walking patterns - dragging, buckling, zigzagging.
• Persistent postural-perceptual dizziness (PPPD): Functional dizziness/balance disorder.

Diagnostic Confidence - The Key Evidence Point

FND is now diagnosed by "positive features" (specific clinical signs) rather than by exclusion. Modern neurology textbooks describe positive signs including:

• Hoover's sign: Indicates functional leg weakness
• Tremor entrainment test: Functional tremor changes when distracted
• Variability and distractibility: Symptoms change with attention
• Drift without pronation: Functional arm weakness pattern
• Normal EEG during typical seizure: Confirms dissociative seizure

If your neurologist used any of these tests, ask them to mention them in your letter. This shows your diagnosis is based on positive evidence, not just "everything else was normal."

The "Conscious Control" Misunderstanding

FND symptoms are not under conscious control - they are involuntary, even though they arise from how the brain functions rather than structural damage. The DWP guidance specifically recognises this. If an assessor implies you could control your symptoms if you wanted to, this misunderstands FND. Quote:

"FND is a recognised neurological condition (ICD-11 6B60). My symptoms are involuntary - I cannot control or suppress them. The NHS Neurology National Service Framework includes FND as a neurological condition requiring multidisciplinary treatment."

Specialist Treatment and Activity 3

Specialist FND treatment is increasingly available but still limited. Treatments include:

• FND-specialist physiotherapy: Often 6-12 week intensive programmes
• FND-specialist occupational therapy
• FND-specialist psychology / CBT
• Inpatient FND programmes: National Hospital for Neurology (Queen Square), Sheffield, Newcastle
• Speech and language therapy for functional speech disorder
• Medication for comorbid conditions (anxiety, depression, pain)

Document any specialist treatment received. For Activity 3 itself, only help from another person with therapy you do at home counts (for example a home exercise programme a helper supervises); clinic and inpatient treatment do not, and help with medication is descriptor b (1 point). If you have been on a waiting list for over 6 months, this itself is evidence of severity.

Triggers and Pattern

FND symptoms often have triggers worth documenting:

• Stress, anxiety, emotional upset
• Physical exertion or fatigue
• Sensory overload (bright lights, noise, crowds)
• Specific contexts (medical settings, public places)
• Hormonal changes (menstrual cycle, pregnancy)
• Sleep deprivation

If your triggers limit your ability to engage with normal life (cannot use public transport because it triggers symptoms, cannot attend social events), this affects Activities 9, 11.

Frequently Asked Questions

My GP said my MRI is normal - does that mean I do not have FND?

Normal imaging is consistent with FND - FND is functional (how the brain works) rather than structural (what the brain looks like). A normal scan supports the diagnosis, not against it. Ask for neurology referral if you have not been formally diagnosed.

Will having a mental health diagnosis hurt my FND PIP claim?

Anxiety, depression and PTSD often coexist with FND but are not the cause. Mental health symptoms add to your overall functional impact and should be listed separately. They strengthen rather than weaken the claim.

I sometimes have a "normal" day - will that count against me?

Variability is a defining feature of FND. Describe the pattern: "Approximately 5 out of 7 days my symptoms are severe enough that I cannot [activity]. On 2 better days I can do more but I cannot predict which type of day I will have."

What if my neurologist used the word "conversion disorder" or "psychogenic"?

These are older terms for what is now called FND. The diagnosis is the same. If your older letters use these terms, the symptoms are still functional/involuntary - the DWP should accept the diagnosis under modern naming.

Can I claim if my dissociative seizures have not been formally diagnosed?

Pursue formal diagnosis through video EEG (gold standard - records normal EEG during a typical seizure). Without diagnosis, the DWP may treat episodes as unexplained or assume epilepsy is being ruled out. Diagnosis significantly strengthens the claim.

My PIP was refused because the assessor said FND is "not a real condition" - what do I do?

This is a clear error. Request MR immediately. Cite WHO ICD-11 6B60 (Dissociative Neurological Symptom Disorder), NHS Neurosciences National Programme of Care and your neurologist's letter. Tribunal success rates for FND cases are high when properly evidenced.

Should I describe physical or psychological causes?

Stick to functional impact - what you cannot do reliably. Avoid getting drawn into "cause" debates with the assessor. FND has both biological and psychological components; what matters for PIP is the impact, not the mechanism.