FndNope
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The Falsification Problem: FND Resolved After CSF Leak Repair
A patient diagnosed with FND recovered completely after surgical repair of a CSF leak. Why did the diagnosis remain? This article explores what the case reveals about comorbidity, diagnostic reasoning, and the falsification problem in FND.
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23Functional neurological disorder (FND) provides a significant diagnostic challenge because of its phenotypic heterogeneity https://t.co/SnIFREidii pic.twitter.com/zccm1f8e7J
— FndNope (@FndNope) March 15, 2026
Discussions started
6Researchers say medicine doesnt work for FND but thats pure conjecture when no one fully knows what causes these symptoms or how the brain is glitching. We cant keep denying people treatments that might help just because of an unproven hypothesis. If it works for someone its usually just treating their claimed comorbidities like pain mood or sleep not the core FND itself. Stop gatekeeping based on theories. Personal results matter more than the current official line.

Whenever I read an FND advocacy page, I like to go back in time using the Internet Archive to see how the narrative has evolved. Comparing older versions with current ones often reveals not just changes in wording, but shifts in priorities and values.
- Original page: http://web.archive.org/web/20160904034822/https://www.fndaction.org.uk/diagnosis/
- Current page: https://www.fndaction.org.uk/diagnosis/
The 2016 page had soul. It was written by patients, for patients. It openly acknowledged the harm people experienced: being made to feel their symptoms were "their fault," being dismissed, left without support, and let down by inconsistent care. It felt urgent, validating, and unapologetically activist.
The current page feels sanitized and clinician focused. It reads as though it was edited by neurologists concerned about sounding too speculative or unscientific. The raw expression of patient suffering is gone. The frustration with poor care is gone. In its place are lengthy discussions of diagnostic pitfalls, positive signs, research priorities, and carefully worded disclaimers. It is all very proper, but it also feels cold and defensive.
Rather than centering the needs of people living with FND, the page seems more concerned with protecting the reputation of the diagnosis. The charity appears to have exchanged genuine patient advocacy for mainstream medical respectability, and in doing so, lost much of its original purpose and emotional impact.
The end result is a page that may be more technically accurate, but is significantly less human. It serves clinicians and the diagnosis better than it serves the patients who are suffering.
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This is the place to share the craziest "my FND did this" claims you’ve seen, hair loss, sudden allergies, psychic powers, eyes changing color, poltergeist activity, speaking unknown languages, etc.
Drop the most ridiculous ones below!
When we initially investigated FND, we were surprised to find almost no official skepticism.
Dr. David Tuller, through his “Trial By Error” series on virology.ws (https://virology.ws/tag/fnd/)He has challenged inflated prevalence claims, the reliability of diagnostic signs, and aspects of FND’s psychological framing.
Are there any other skeptical sources out there?