Download FND app Android Aapp IoS App
FND Links Feedback Donate Language
  • English
Home / FAQ / How common is FND?

How common is FND?

The answer to this question depends on what data you look at. As this has been an area that has led to confusion, I’ve laid out some of the studies below. Sorry it’s a bit technical. The bottom line is that FND is one of the commonest conditions in neurology, but it’s been hidden from view, and a lot more people have it than most people realise.

FND has been found to be one of the commonest reasons to see a neurologist.

In Emergency Medicine settings FND is also common.

How many people in the USA or UK have FND?

This is a hard question to answer accurately but an estimate can be made by looking at the two most common types of FND, functional seizures and functional movement disorders (including limb weakness and stroke-like presentations). If the best estimates of those conditions (Duncan et al., 2011)(Villagrán et al., 2021) are put together with studies of children and young people (Hansen et al., 2020) (which don’t appear in the same studies), along with studies that tell us how long, on average people have FND symptoms for, then we end up with a figure of between 250,000-500,000 in the US and around 50-100,000 in the UK. The true number may be less than that, but it also could be a lot more.

Another recent study from general practice (family doctors) covering 72% of people in Scotland found that FND had been diagnosed in 8040 people. That would be equivalent to 11,150 people in Scotland and around 140,000 people in the UK. 

Most neurologists acknowledge that FND is underestimated in clinical services as its often poorly coded by hospital administration systems. In some parts of the world, neurologists don’t receive payment if they use existing codes for FND which reduces estimates (Stone et al., 2014). Better studies would be welcome to gain a more accurate idea of the precise numbers, but it’s clear that it’s a common problem.

In the US a study of costs of FND showed that it was consuming over $1 billion dollars in inpatient costs a year – similar to motor neuron disease/ amyotrophic lateral sclerosis (Stephen et al., 2021).


Ahmad O, Ahmad KE. Functional neurological disorders in outpatient practice: An Australian cohort. J Clin Neurosci 2016; 28: 93–96.

Beharry J, Palmer D, Wu T, Wilson D, Le Heron C, Mason D, et al. Functional neurological disorders presenting as emergencies to secondary care. Eur J Neurol 2021; 28: 1441–1445.

Duncan R, Razvi S, Mulhern S. Newly presenting psychogenic nonepileptic seizures: Incidence, population characteristics, and early outcome from a prospective audit of a first seizure clinic. Epilepsy Behav 2011; 20: 308–311.

Gargalas S, Weeks R, Khan-Bourne N, Shotbolt P, Simblett S, Ashraf L, et al. Incidence and outcome of functional stroke mimics admitted to a hyperacute stroke unit. J Neurol Neurosurg Psychiatry 2017; 88: 2–6.

Hansen AS, Rask CU, Rodrigo-Domingo M, Pristed SG, Christensen J, Nielsen RE. Incidence rates and characteristics of pediatric onset psychogenic nonepileptic seizures. Pediatr Res 2020; 88: 796–803.

Lehn A, Watson E, Ryan EG, Jones M, Cheah V, Dionisio S. Psychogenic nonepileptic seizures treated as epileptic seizures in the emergency department. Epilepsia 2021; 62: 2416–2425.

Nandi DN, Banerjee G, Nandi S, Nandi P. Is hysteria on the wane? A community survey in West Bengal, India. Br J Psychiatry 1992; 160: 87–91.

Parry AM, Murray B, Hart Y, Bass C. Audit of resource use in patients with non-organic disorders admitted to a UK neurology unit [6]. J Neurol Neurosurg Psychiatry 2006; 77: 1200–1201.

Stephen CD, Fung V, Lungu CI, Espay AJ. Assessment of Emergency Department and Inpatient Use and Costs in Adult and Pediatric Functional Neurological Disorders. JAMA Neurol 2021; 78: 88–101.

Stone J, Carson A, Duncan R, Coleman R, Roberts R, Warlow C, et al. Symptoms ‘unexplained by organic disease’ in 1144 new neurology out-patients: how often does the diagnosis change at follow-up? Brain 2009; 132: 2878–88.

Stone J, Hallett M, Carson A, Bergen D, Shakir R. Functional disorders in the Neurology section of ICD-11: A landmark opportunity. Neurology 2014; 83

Villagrán A, Eldøen G, Duncan R, Aaberg KM, Hofoss D, Lossius MI. Incidence and prevalence of psychogenic nonepileptic seizures in a Norwegian county: A 10-year population-based study. Epilepsia 2021; 62: 1528–1535.

Watila MM, Duncan C, MacKay G. Evaluation of telemedicine for new outpatient neurological consultations. BMJ Neurol Open 2022; 4: 1–8.

how much water should you dr nk to lose weight weight loss agency weight loss cleanses at home what to eat for keto diet lose weight in 24 hours body slimmer diet pills anorexia tips lose weight fast best weight loss pills to curb appetite how many calories to eat per day to lose weight lupus keto diet weight loss pills for diabetes eric greenspan weight loss percentage of weight loss calculator how can i lose weight fast without exercise and pills best heart rate to lose weight javita coffee weight loss how to safely lose weight during pregnancy alkaline keto diet plan how to lose weight in neck how much weight can i lose in 1 month keto zone diet pdf 2day diet pills reviews weight loss pill garcinia cambogia j j smith weight loss redotex diet pills for sale online chocolate and keto diet keto diet means where to get adipex diet pills keto diet pizza potatoes keto diet diarrhea pills to lose weight weight loss motivational quotes weight loss pills to get rid of belly fat diet pills cleanse watchdog best diet pills eating once a day weight loss retiva diet pills bee pollen pills for weight loss reviews gravy on keto diet waist trainer for weight loss

is cbd oil legal in ny how to take 600 mg cbd oil cbd oil for sex hemp oil constipation cbd oil dosing for parkinsons are cbd oil capsules effective making cannabis oil with everclear cbd oil reseller health hut cbd oil how to legal start producing cbd oil in kentucky 2021 benefits of cbd oil for the body cbd oil 24 hour fitness what are the best selling cbd oil products how long cbd oil in urine how to rake cbd oil cannabidiol and sleep disorders whats the difference between cbd oil and mtc oil 1 oz cbd oil reviews purekana cbd oil how do i know what percent my cbd oil is cbd oil does it help you to lose weight how to make cbd oil taste better does the switch brand of cbd oil have hemp in it equilibrium nutrtion cbd oil cbd oil hemp sleep cbd oil dose in dpogs cbd oil makes mouth numb cbd oil and fibromyalgia proof cbd oil users groups does cbd oil help itching how long does it take for cbd oil drops to kick in coorado cbd oil company plus cbd oil capsules and parkinsons disease hemp oil nerve pain cbd oil on zip code 89113 exotic watermelon kush cbd oil 75 mg fda declared cbd oil illegal cbd oil amazon reddit cbd oil white label dropship is cbd oil and hemp oil the same thing

home window repair maryland andersen window hardware replacement home window repair north las vegas window replacement santa barbara hawaii islnd home window repair window air conditioner bracket installation double hung window glass replacement replace wooden window frame single hung window repair parts window repair in phoenix az home window replacement near 76058 black magic window tint installation home window replacement how to magic replacement windows family owned home window replacement cost vs value replacement windows pocket replacement windows home window replacement mobile glass door window replacement home window repair fenton mo replacement windows aurora co condo window replacement cost cost of windows replacement basement window pane replacement window replacement york pa home window repair the track window replacement glass near me home window replacement prices andersen awning window replacement parts diy basement window replacement how to measure replacement window size lowes home window repair window blinds installation companies sliding windows replacement window glass repair chicago il window pivot bar replacement parts cost to replace window glass in house double window installation window replacement gulfport winton home window repair

drinks that make you last longer in bed male extra for sale horse viagra cialis advertisement can viagra lower blood pressure how to give him the best pleasure xomax male enhancement how to apply aloe vera for male enhancement drugs and erectile dysfunction do penis pills sork side effects of nugenix testosterone booster does testosterone booster work testosterone pills help grow facial hair best rated natural testosterone booster best all natural testosterone supplements best ed drug 4 male enhancement male enhancement genesis pills natural erection pills over the counter cheap erectile dysfunction medicine complete loss of libido male can working out increase libido grow male enhancement pills best natural male libido enhancers do male enhancement pills make you last longer boost male enhancement pills male enhancement pills on percilla tulsa stores taking extenze is there any proof male enhancement pills work best male enhancement pill for men 70 years older male enhancement pills to keep you hard longer how long does a viagra tablet last penis pills billy zambka how to make penis bigger pills penis pills for size sex supplements for men after hrt can i take penis enhancement pills best non prescription viagra alternative disadvantages of testosterone pills night bullet pill