How it can feel
- A leg that is “there” but will not hold weight.
- An arm that drops when you try to hold a cup or phone.
- Heaviness, dragging, or a sense the limb is not fully yours.
- Strength that comes and goes — worse when you are tired, overloaded, or being watched and tested.
- Fear of falling that grows after near-misses.
Day to day
- Walking, stairs, transfers and standing in queues can become hard work.
- Dressing, cooking and carrying bags may need new strategies or aids on high-load days.
- People may say you “look fine” on a stronger morning and dismiss a weaker afternoon.
Why this can be FND (simply)
In FND, the problem is often how the nervous system is coordinating movement — a function problem — rather than a structural cut in the pathway. That is why standard imaging can be clear while weakness is still disabling. The weakness is not chosen and not “put on”.
What can help
- A clear explanation that the symptom is real and involuntary.
- Specialist physiotherapy or occupational therapy that understands functional patterns (not “push through pain” alone).
- Pacing, rest breaks, and planning high-effort tasks for better windows.
- Aids used as tools for safety and energy — not as failure.
- Tracking patterns (time of day, sleep, overload) for clinic conversations.
This is information, not a treatment plan. Personal care decisions belong with you and your clinicians.
For carers
Offer a steady arm or space rather than arguing with the limb. Ask what helps in the moment. Avoid using a stronger hour as proof they are “fine”.
FAQs
Can my leg be weak if the MRI is normal?
Yes. FND affects function. Normal imaging does not mean the weakness is imaginary.
Why does strength change so much?
Fluctuation is common in FND. Fatigue, sensory load, attention and recovery debt can all change how well movement programmes run.
Will I need a wheelchair forever?
Not necessarily. Some people use aids part-time or temporarily. Needs change. The aim is safety and participation, not proving toughness.