FND symptoms · Often with FND

Gut, chest and other body symptoms

When the whole body joins the nervous-system story

Also called: IBS · functional dyspepsia · breathing pattern disorder · functional body symptoms

People with FND more often also meet functional gut symptoms, breathing pattern problems, chest tightness without cardiac disease, jaw pain and related patterns. Each still needs appropriate checks.

FND Connect information guide About 2 min read

This can occur alongside FND. It is not necessarily caused by FND and may need its own assessment and treatment.

Practical support When to get help

When to get help. Urgent care for severe chest pain, black stools, vomiting blood, breathlessness at rest, or collapse. Never assume cardiac or GI emergencies are “functional” without assessment. Urgent help and advice.

On this page

How it can feel

Bloating, pain, urgent bowels or nausea.
Breath that will not feel full; air hunger.
Chest tightness that sparks health fear.
Jaw clenching and facial pain.

Day to day

Food rules and toilet mapping take over outings.
Breathing symptoms mimic panic and feed it.
Multiple clinics can fragment care — a shared plan helps.

How this can relate to FND

The nervous system runs gut motility, breathing rhythm and muscle tension. Functional disorders in different systems often cluster. That clustering is recognised — it is not you “collecting diagnoses for fun”.

What can help

Medical assessment for each major symptom pathway.
Dietetic / GI input for IBS-type symptoms where appropriate.
Breathing retraining with a knowledgeable physio for breathing pattern disorder.
Integrated pacing across all symptoms, not separate boom-bust cycles.

This is information, not a treatment plan. Personal care decisions belong with you and your clinicians.

FAQs

Why do I keep getting “normal” tests?

Functional gut and breathing problems often show normal structural tests. Normal does not mean imaginary — but new red flags still need review.

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.

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.

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