This page is for general education and is not medical advice. It is not a substitute for diagnosis or treatment by a qualified professional. If this is an emergency, call 911 or 988.
Conversion disorder — now usually called functional neurological disorder (FND) — involves neurological symptoms such as weakness, abnormal movements, or non-epileptic seizures that are genuinely experienced but are not explained by a structural disease on standard tests. The symptoms are real, not imagined or faked, and they often improve with the right treatment.
Key facts
- The condition reflects a problem in how the nervous system functions, not a structural disease (MedlinePlus).
- Symptoms are involuntary and genuine — people are not producing them on purpose.
- It often appears alongside stress, anxiety, or past trauma, though not everyone has an identifiable trigger.
- Care is typically multidisciplinary, and education about the condition is itself part of treatment.
What it is
FND sits at the meeting point of neurology and mental health. The brain’s hardware can look intact on scans, yet the signals controlling movement, sensation, or awareness are disrupted. Understanding the diagnosis — that this is a recognized, treatable disorder of function — is often a turning point, because it replaces fear and uncertainty with a plan.
Symptoms
- Weakness or paralysis of a limb
- Tremor or other abnormal movements
- Non-epileptic seizures (events that look like seizures but are not caused by epileptic activity)
- Numbness, altered sensation, or changes in vision or speech
- Difficulty walking or with balance
Symptoms can come and go, and they may worsen with stress.
Causes
There is no single cause. FND can be triggered or worsened by physical or emotional stress, illness or injury, and trauma, and it commonly co-occurs with anxiety and depression. Biological and psychological factors interact, which is why a one-size-fits-all explanation does not fit.
How it is treated
Treatment usually involves a coordinated team. Physical or occupational therapy retrains movement; psychological therapy such as cognitive behavioral therapy (CBT) helps with the stress, anxiety, or trauma that often accompany FND; and clear education reduces fear and supports recovery. Addressing co-occurring anxiety frequently helps the overall picture.
From our clinical review. The single most healing moment for many patients is hearing that the symptoms are real and have a name. People spend months fearing a hidden catastrophe. Naming FND — and explaining that function can be retrained — turns a frightening mystery into something we can actually work on together.
If you are living with symptoms like these, you deserve a clear plan and a team that takes them seriously. Explore CBT, find care and support with Find Help by State, or talk to someone about what you are experiencing.
Frequently asked questions
Is conversion disorder real, or are the symptoms imagined?
The symptoms are real and not faked. Conversion disorder, now often called functional neurological disorder, involves genuine problems with how the nervous system functions — such as weakness or non-epileptic seizures — even though standard tests do not show structural damage.
What is the difference between conversion disorder and FND?
They refer to the same condition. Functional neurological disorder (FND) is the more current term, reflecting that the problem is in how the brain and body send and process signals — the function — rather than in a structural disease.
Can conversion disorder be treated?
Yes. Treatment is usually a team effort that can include physical or occupational therapy, psychological therapy such as CBT, and clear education about how the condition works. Many people improve, especially with early, coordinated care.
Sources
- Functional neurological disorder — MedlinePlus, U.S. National Library of Medicine
- Mental Health and Mental Disorders — MedlinePlus, U.S. National Library of Medicine
- Health Topics — National Institute of Mental Health (NIMH)
Reviewed against the sources above. This page is educational and is not medical advice.