Information for parents
Disorders of Gut-Brain Interaction in Children
Disorders of gut-brain interaction (DGBI) — including functional abdominal pain, irritable bowel syndrome (IBS) and functional dyspepsia — are among the most common causes of recurring tummy pain in children and teenagers.
They happen when the communication between the gut and the brain becomes oversensitive. Tests are usually normal because nothing is damaged or inflamed, but the pain is genuine and can have a big impact on daily life.
The pain is real.
Normal test results do not mean your child is imagining their symptoms or making them up. They mean the cause is in how the gut and nervous system are working, rather than in visible damage. Recognising this is often the first step towards getting better.
How the gut and brain communicate
The gut has its own extensive network of nerves, sometimes called the ‘second brain’, which is in constant two-way contact with the brain. This system controls how the gut moves, how it senses stretching and how strongly those signals are felt.
After a trigger — such as a gut infection, a period of constipation, a stressful time, or sometimes no obvious trigger at all — this communication can become turned up, a bit like a smoke alarm that goes off with burnt toast.
Visceral hypersensitivity
Visceral hypersensitivity means the gut’s nerves are more sensitive than usual. Normal things like digestion, gas or the bowel stretching can be felt as pain. This is a well-described, measurable phenomenon — not a sign of weakness or exaggeration.
Common types in children
Functional abdominal pain
Recurring pain, often around the belly button, without a consistent link to bowel motions or eating.
Irritable bowel syndrome (IBS)
Pain linked to bowel habits, with diarrhoea, constipation or both, and often bloating.
Functional dyspepsia
Pain or burning in the upper tummy, early fullness, nausea or discomfort after meals.
The role of sleep, stress and everyday life
Poor sleep, busy schedules, worries about school or friendships, and illness can all turn up gut sensitivity — just as a stressful day can give adults a ‘nervous stomach’. This does not mean symptoms are ‘just anxiety’. It means the whole system, body and mind, is involved, and treatment works best when it considers both.
Why repeated investigations are not always helpful
Once a careful assessment has excluded warning signs and appropriate tests have been done, repeating tests rarely finds anything new. It can also prolong worry and time off school, and sometimes lead to procedures with their own risks. A confident diagnosis, with a clear plan and agreed signs that would prompt re-assessment, is often more helpful.
Restoring school, sport, eating and normal activity
Pain can lead to missed school, stopping sport, avoiding food and disrupted sleep — which in turn can make pain worse. Gently returning to normal routines, even while some pain persists, is one of the most effective parts of treatment. Schools can often help with a plan that supports attendance.
Treatment approaches
There is no single cure, but many children improve significantly with a combination of approaches tailored to them:
- Clear explanation of what is happening, which in itself reduces fear and pain
- Treating any constipation, which often coexists
- Regular meals, good sleep and physical activity
- Medicines in selected cases, for particular symptom patterns
- Dietary interventions when appropriate — for example a supervised, time-limited low-FODMAP trial in some teenagers with IBS, guided by a dietitian
- Psychological and gut-directed therapies, such as cognitive behavioural therapy or gut-directed hypnotherapy, which have good evidence in children
When should I be concerned?
Gut-brain disorders do not cause the following. If any are present, further assessment is needed:
- Weight loss or poor growth
- Blood in the poo or vomit
- Persistent diarrhoea or vomiting
- Symptoms that regularly wake your child from sleep
- Fever, mouth ulcers, joint pain or rashes
- Difficulty swallowing
- A family history of IBD or coeliac disease
When should my child see a paediatric gastroenterologist?
Constipation can cause or worsen tummy pain — see constipation in children and abdominal pain in children.
A paediatric gastroenterologist can help confirm the diagnosis, make sure appropriate tests have been done without over-investigating, and build a practical plan with your family, GP and, where helpful, a psychologist or dietitian.
Straight answers
Questions parents often ask
How can my child have pain when every test is normal?
Because the problem lies in how sensitive the gut’s nerves are and how the gut and brain communicate, not in visible damage. Tests look for damage and inflammation, so they are expected to be normal.
Is this psychological?
No — it is a real physical condition involving the nervous system of the gut. Psychological therapies can help, in the same way physiotherapy helps a sore back, because they calm the pain system.
Does anxiety cause stomach pain?
Worry can turn up gut sensitivity, and pain can cause worry, so the two often feed each other. Anxiety is not the whole explanation, but addressing it can be part of getting better.
Could doctors be missing something?
It is a very natural worry. A careful history, examination and appropriate tests are good at identifying conditions that need specific treatment. Your doctor should also explain which new symptoms would prompt a fresh look.
Will my child grow out of it?
Many children improve significantly over time, particularly with the right support. Some have symptoms that come and go, but most learn to manage them well.
Can children with IBS live normally?
Yes. With a good understanding of the condition and a practical plan, children with IBS can go to school, play sport and enjoy normal lives.
Related children’s gut-health resources
Abdominal Pain in Children
Common causes of recurring tummy pain and the signs that deserve a closer look.
Constipation in Children
Withholding, painful poos, soiling and why treatment often takes months rather than days.
Coeliac Disease in Children
Testing, when a gastroscopy is needed, and why not to stop gluten too early.
If your child has persistent gastrointestinal symptoms or your GP has recommended specialist assessment, you can find information about appointments with Dr Rohan Malik here.