How to Explain FND Symptoms Without Losing the Plot

The hard part is often not the symptom itself. It's watching someone struggle to walk, speak, see clearly, move a limb, or stay present, then being asked to explain it in a sentence to a doctor, supervisor, relative, or skeptical stranger. Having language ready for that moment matters, without turning your loved one into a case file or asking them to prove they're suffering.

Functional Neurological Disorder, or FND, is real. It involves changes in how the nervous system functions, which can produce genuine neurological symptoms even when a scan or standard test doesn't show structural damage that explains them. FND is diagnosed using positive clinical features, not simply because every other possibility has been ruled out (Espay et al., 2018, JAMA Neurology).

Espay AJ, Aybek S, Carson A, et al. Current Concepts in Diagnosis and Treatment of Functional Neurological Disorders. JAMA Neurology. 2018;75(9):1132-1141.

That distinction matters. "Nothing showed up on the MRI" doesn't mean "nothing is wrong." Those are wildly different sentences, and families deserve clinicians and support systems that understand the difference.

A Plain-Language Explanation to Start With

A useful starting point: "FND is a condition where the brain and body are having trouble sending, receiving, or controlling signals normally. The symptoms are real, and they can change from day to day."

That's not a perfect explanation for every person, because FND doesn't show up the same way in every body, but it's accurate enough to open the door. FND may involve movement symptoms such as weakness, tremor, jerking, gait problems, or episodes that resemble seizures. It can also involve sensory changes, speech difficulties, dizziness, fatigue, pain, cognitive complaints, or functional seizures. Symptoms can be disabling and may fluctuate with exertion, stress, illness, sleep disruption, or other individual triggers (Espay et al., 2018; National Institute of Neurological Disorders and Stroke, Functional Neurologic Disorder).

If someone pushes for a simpler label, you can say: "The hardware may be intact, but the signaling isn't working reliably right now." Use that as an analogy, not a diagnosis lesson. An analogy should help people understand, not make them feel talked down to.

Avoid saying the symptoms are "all in their head." Thoughts, stress, trauma, physical illness, pain, and nervous-system responses can all affect symptoms, but FND is not a person faking, imagining, or choosing what's happening. Research and clinical guidance describe FND as a disorder of neurological functioning with recognizable signs on examination.

Explaining FND to Different People

You don't owe every person the full medical history. A family member may need a human explanation. An employer may need a functional one. An emergency clinician needs a concise history and information about what's typical versus new. Same condition, different conversation.

Family or Friends

Try: "Their nervous system can misfire in ways that affect movement, speech, awareness, or energy. It's unpredictable, and pushing through can make recovery harder. What helps most is believing them, staying calm, and asking what support they need today."

This framing gives people a job besides judging, and it avoids making symptoms sound like a personality problem. If a relative thinks the person "looked fine yesterday," remind them that fluctuation is part of the condition. A good hour doesn't erase a bad day.

An Employer, School, or Community Group

Keep the focus on function, not private details: "They have a diagnosed neurological condition with symptoms that can fluctuate. They may need predictable breaks, flexibility around symptom flares, a quieter environment, mobility support, or time for appointments."

The right accommodation depends on the person's actual limitations and role. Don't promise symptoms will follow a neat schedule if they won't. Be specific about what helps them participate safely and consistently.

A Health Care Team

Lead with what changed, what's usual, and what creates immediate risk. For example: "They have diagnosed FND with episodes of leg weakness and functional seizures. Today this episode lasted longer than usual, there was a fall with a head strike, and they're not returning to their usual baseline."

FND can coexist with other neurological or medical conditions, so families shouldn't assume every new symptom is "just FND." New one-sided weakness, severe headache, chest pain, serious injury, prolonged unresponsiveness, or other urgent changes deserve prompt medical assessment.

Someone Who Thinks Stress Means Fake

You can be direct: "Stress can affect the nervous system. So can lack of sleep, pain, infection, grief, and overexertion. That doesn't make the symptoms voluntary."

Trauma and mental health concerns may be relevant for some people with FND, including veterans and survivors of violence or injury. They're not required for an FND diagnosis, and nobody should be forced to disclose trauma to earn basic respect or care.

Describe What You See, Not What You Think It Means

Caregivers often become accidental translators. The most useful information is usually concrete: what happened, how long it lasted, what came before it, what helped, and how the person recovered.

Instead of "She had a bad episode," say: "Her right leg began dragging after she stood in a crowded store for 20 minutes. She needed to sit, used her cane, and her walking improved after rest, but fatigue lasted the rest of the day."

Instead of "He was out of it," say: "He became unresponsive to conversation for about four minutes, had shaking in both arms, did not fall, and was confused for 15 minutes afterward." Functional seizures are real events and should be evaluated and managed by qualified clinicians. Clear observation helps the care team distinguish patterns and make a plan (National Institute of Neurological Disorders and Stroke, Functional Neurologic Disorder).

A short symptom log can be useful if it doesn't become another unpaid full-time job. Record date, symptom, duration, possible trigger, recovery, falls or injuries, and what support helped. Bring a pattern, not a novel. If tracking makes the household more anxious, scale it back.

Language That Protects Dignity

The words around FND can either lower the temperature or light the room on fire. Prefer "functional seizures" over dismissive labels. Say "symptoms" or "episodes," not "attention-seeking behavior." Say "they're having trouble walking today," not "they refuse to walk."

This doesn't mean pretending every moment is easy or that caregiving is saintly. Some days are frightening, exhausting, inconvenient, and deeply unfair. You can say that plainly while still respecting the person living in the body that won't cooperate.

It also helps to ask the person with FND how they want their condition described. Some prefer "neurological disorder." Others want the full name. Some want no label shared at all. Autonomy matters, especially when illness has already taken so much control off the table.

What Not to Say

A few phrases tend to make a difficult situation worse:

• "The tests are normal, so you're fine."
• "It's just anxiety."
• "You don't look sick."
• "If you can do it sometimes, you can do it anytime."
• "There's nothing wrong with you."

Each one confuses an invisible or fluctuating condition with an imaginary one, and it also teaches people to hide symptoms until a crisis forces the issue, which isn't toughness, it's a bad safety plan.

Let the Explanation Be Short When the Day Is Long

You don't have to deliver a full history from the parking lot of a specialist appointment. A one-sentence version is enough when energy is low: "FND causes real neurological symptoms that can fluctuate, and we're following a treatment plan with the care team."

A longer version is available for the people who have earned it. The goal isn't to win an argument with every doubter. The goal is to get your loved one believed, supported, and safer while preserving as much dignity as possible.

If you're the caregiver, save one honest sentence for yourself too: "I don't have to explain this perfectly to know it's real." That may be the sentence that gets you through the next appointment, the next flare, and the next person who needs educating.

Sources

1. Espay AJ, Aybek S, Carson A, et al. Current Concepts in Diagnosis and Treatment of Functional Neurological Disorders. JAMA Neurology. 2018;75(9):1132-1141.
2. National Institute of Neurological Disorders and Stroke. Functional Neurologic Disorder. Federal health agency clinical information.

Robbins Nest Alliance is a 501(c)(3) nonprofit providing free brain injury education for caregivers, veterans, and families. All content is peer-reviewed and cited. This article is for educational purposes only and is not a substitute for medical advice. Always work with your qualified care team.