What is Functional Neurological Disorder?
A neurological disorder in which your brain sometimes fails to communicate properly with your body. Simple to say — harder to live inside of.
The wiring is fine. The messages aren’t.
FND is a neurological disorder. That means the brain itself is involved — but not in the way most people expect. The structure of the brain isn’t damaged. Instead, the way signals are sent between brain and body gets disrupted.
A signal to move ends up as stillness. A signal to see ends up as blur. The body does what it’s told — it’s just being told the wrong thing.
Sorted into brain and body.
A snapshot here — the Symptoms page goes deeper with an interactive explorer.
Brain
- Brain fog
- Dizziness
- Nausea
- Headaches
Body
- Non-epileptic seizures
- Temporary loss of vision or hearing
- Temporary paralysis
- A body that feels heavy
- Tics & involuntary movements
Invisible on a scan — but present in every hour of the day.
Other neurological conditions
Often show physical damage — lesions, shrinkage, plaques — visible on an MRI or CT.
FND
Shows nothing visible. The hardware looks fine. It’s how the brain is using itself that’s gone awry.
“It’s all in your head” is the most corrosive thing someone with FND can hear.
A common misconception is that FND isn’t real — that it’s being imagined, exaggerated, or performed. This is partly because people with FND can sometimes force a symptom to stop for a brief window of time.
But that window comes at a cost: the symptoms almost always rebound harder afterwards. A moment of control is not the same as a cure, and it is certainly not evidence that the condition was ever fake.