On this page
How it can feel
- Sudden jumps in an arm, leg, trunk or whole body.
- Twitches that interrupt speech, walking or sleep.
- A body that startles more easily than before.
- Embarrassment when movements arrive mid-conversation.
Day to day
- Holding cups, walking near edges, and public spaces can feel riskier.
- Sleep fragmentation if jerks continue at night.
- Avoidance of social settings after visible episodes.
Understanding this FND symptom
These movements are produced by the nervous system without voluntary control. Variable intensity and distractibility can be part of the functional pattern.
What can help
- Clear diagnosis and education.
- Physiotherapy approaches for functional hyperkinetic movements.
- Sleep support and reducing stimulant overload where relevant.
- Anxiety about the jerk itself can become a second load — naming that helps.
This is information, not a treatment plan. Personal care decisions belong with you and your clinicians.
FAQs
Are jerks the same as tics?
They can look similar but are assessed differently. A clinician sorts the pattern; this page is information only.
About this guide & further reading
Written and published by FND Connect. This is general information for people living with FND and those supporting them. It does not diagnose a symptom or replace advice from your clinician.
- Neurosymptoms: Jerks and twitches
- North Bristol NHS Trust: functional neurological symptoms
- Neurosymptoms: when new or different symptoms need reassessment
External resources provide further reading; their inclusion does not mean their authors have reviewed or endorsed this FND Connect guide. Page updated 3 October 2026.
Take this to your next conversation
Note what happens, how it affects your day and what you want to ask. An appointment pack can help you organise that conversation.