What parents need to understand about functional tummy pain and the gut-brain connection in children
Medically Reviewed by Bahee Van de Bor, RD, BCAPSc PGDipDiet, Specialist Paediatric Dietitian, former specialist dietitian at Great Ormond Street Hospital, with over 20 years of clinical experience in paediatric digestive health.
Your child keeps complaining of tummy pain.
Blood tests are normal.
Coeliac disease and inflammatory bowel disease have been ruled out.
Their growth is fine.
Yet they still tell you their tummy hurts before school, at bedtime, after meals, or seemingly for no reason at all.
If this sounds familiar, you are not alone.
One of the most common things parents tell me is:
“The tests are normal, but something clearly is not right.”
They are not imagining it. And neither is their child.
Key takeaway
Most children with daily tummy pain and normal tests do not have a serious underlying disease. Many have a disorder of gut-brain interaction, where communication between the gut and brain becomes amplified. The pain is completely real, but the gut is functioning differently rather than being structurally damaged.
My child complains of stomach pain every day. Is that normal?
If your child complains of stomach pain every day, it can be incredibly worrying.
Many parents start wondering whether something serious has been missed.
Others worry their child is becoming anxious or focusing too much on their symptoms.
In reality, daily tummy pain is one of the most common reasons children are referred to paediatric gastroenterology clinics.
The reassuring news is that most children with daily tummy pain do not have a serious underlying disease.
The challenge is understanding what is driving the symptoms and how to break the cycle.
When should I worry about my child’s tummy pain?
Before anything else, it is worth knowing which symptoms always need prompt medical review.
Contact your GP or paediatrician if your child has any of the following:
- Blood in the stool
- Unintentional weight loss
- Poor growth or growth delay
- Loss of appetite
- Pain or symptoms that wake the child from sleep
- Recurrent vomiting
- Fever
- Skin rash or joint involvement alongside gut symptoms
- Anaemia
- Family history of inflammatory bowel disease, coeliac disease or colorectal cancer
Red flag symptoms based on Rome V criteria for paediatric disorders of gut-brain interaction (Di Lorenzo et al., Gastroenterology 2026).
That distinction matters enormously, because functional pain responds to very different approaches than structural disease.
If none of these are present and tests have come back normal, the pain is real but the cause is likely functional rather than structural.
| Structural pain | Functional gut-brain pain |
|---|---|
| Accompanied by red flags such as fever, weight loss or blood in stool | Normal blood tests, normal growth, clear investigations |
| Caused by physical damage or inflammation | Caused by nervous system hypersensitivity |
| Responds to medical or pharmaceutical treatment | Responds to routine, dietary support and gut-brain approaches |
Why do some children get tummy pain even when tests are normal?
This is the question that frustrates most families.
Tests look for damage, infection, inflammation, and structural abnormalities.
When they come back clear, it does not mean nothing is wrong.
It means the gut is functioning differently rather than being structurally damaged.
The most common reasons for recurrent tummy pain in children with normal tests include:
- Irritable bowel syndrome
- Functional abdominal pain
- Constipation, including overflow that is not immediately obvious
- Post-infectious gut sensitivity following a stomach bug
All of these fall under a category called disorders of gut-brain interaction.
This is not a dustbin diagnosis or a way of saying the pain is psychological.
It is a recognised clinical framework that describes conditions where the communication between the gut and the brain is not working as it should.
Can anxiety cause tummy pain in children?
Yes, anxiety can cause stomach pain in children through the gut-brain axis.
When a child experiences stress or anxiety, signals travel directly to the digestive tract, which can alter gut movement and amplify pain signals.
The gut and the brain are in constant two-way communication through a network of nerves, hormones and immune signals called the gut-brain axis.
When a child feels anxious or stressed, that signal travels directly to the gut and alters how it functions.
Gut movements speed up or slow down.
The gut becomes more sensitive to normal digestive sensations.
Pain that would not normally register becomes amplified.
This is called visceral hypersensitivity, and it is one of the most important concepts for parents to understand.
The pain is completely real.
It is not invented, exaggerated, or imagined.
The gut’s pain signalling system is genuinely amplified, sending stronger pain signals than usual in response to normal gut activity.
A child with visceral hypersensitivity feels real pain from normal digestion.
That is not a psychological problem.
It is a physiological one with a psychological component.
Signs your child’s tummy pain may be linked to stress or anxiety
The pattern of when pain occurs is often the most important clue.
Parents often notice tummy pain that:
- Appears before school, particularly on Sunday evenings or Monday mornings
- Gets worse during exam periods or at times of social pressure
- Flares around transitions, a new school year, a change of teacher, starting secondary school
- Improves during school holidays but returns when term begins
- Is accompanied by headaches or frequent trips to the toilet
- Occurs alongside sleep difficulties, including anxiety or worry at bedtime that delays sleep or affects overall sleep quality
None of this means the child is anxious in a problematic sense.
It means their nervous system is more reactive than average, and that their gut is particularly sensitive to emotional signals.
Some children are simply wired this way. It is not a parenting failure and it is not the child’s fault.
Why does tummy pain so often happen before school?
Pre-school tummy pain is one of the most recognisable patterns I see in clinic.
The anticipatory anxiety of the school day, the rush of getting ready, the worry about what the day holds, all of these send signals directly to a sensitised gut before the child has even left the house.
For some children this happens every single morning.
For others it is worse on certain days, before PE, before a test, before a social situation they are dreading.
The pain is real. The pattern is recognisable. And it does not mean your child is making it up to avoid school.
If this pattern sounds familiar, read why children get tummy pain before school.
Why does my child’s tummy hurt at bedtime?
Bedtime is another common trigger that parents often recognise.
During the day, children are distracted by school, friends, activities and screens.
At night, when the house is quiet and there is nothing to focus on, the mind turns inward.
Worries that were pushed aside during the day surface at bedtime.
Anxiety increases.
And in a child with a sensitised gut, that anxious state sends direct signals to the digestive system, amplifying sensations that might otherwise go unnoticed.
Some children also become more aware of normal body sensations at night, including the ordinary movements of digestion, which can feel uncomfortable or alarming to a gut that is already on high alert.
Tummy pain at bedtime is not your child being awkward or trying to delay sleep.
It is the gut-brain connection responding to the quieter, less distracted state of the evening.
Is your child still not right after a stomach bug?
Download the free guide and find out why some children don’t bounce back and what actually helps.
The problem is not usually anxiety OR the gut
This is the thought reversal that changes how most families approach treatment.
Parents often arrive wondering:
Is this an anxiety problem?
Or is it a gut problem?
The honest answer is usually: both, and neither in isolation.
The gut and the brain influence each other continuously and bidirectionally.
Anxiety can trigger gut symptoms.
But gut symptoms can also drive anxiety.
A child who is in pain before school starts to dread school.
Dreading school makes the pain worse.
The pain makes school harder to attend.
And the cycle deepens.
This is why treating the gut alone, with dietary changes or laxatives, rarely resolves the full picture in these children.
And why treating the anxiety alone, without addressing the gut symptoms, often falls short too.
The most effective approach addresses both sides of the gut-brain connection at the same time.
What about diet?
Diet plays a role in managing functional tummy pain in children.
For some children, the balance of certain fibres or fermentable carbohydrates may exceed what their gut can comfortably tolerate, contributing to bloating and pain.
Irregular meals can also destabilise gut function in a child who already has a reactive gut.
And constipation, even mild constipation that parents may not have identified, can significantly worsen tummy pain.
Understanding which dietary factors are relevant for your child, and in what combination, is part of the assessment process.
Diet can be part of the solution. The key is identifying which part.
What actually helps?
Managing functional tummy pain in children with a gut-brain component usually involves several things working together.
Regular meals and a predictable eating routine
A sensitised gut responds better to consistency.
Skipping meals or eating at unpredictable times increases gut reactivity.
Addressing constipation first
Before assuming anxiety is the primary driver, it is worth checking whether constipation is contributing.
Constipation is one of the most commonly missed drivers of recurrent tummy pain in children and it can be subtle.
Identifying and reducing triggers where possible
Not every trigger can be eliminated, but understanding the pattern helps families feel less helpless and gives children some sense of control over their symptoms.
Supporting the gut-brain connection
This might include approaches that help regulate the nervous system, reduce the cycle of pain and anxiety, and restore the child’s confidence around symptoms.
Movement and sleep
Both have a direct impact on gut function and on how the nervous system responds to stress.
A child who is not sleeping and not moving is a child whose gut-brain connection has fewer resources to regulate itself.
A note on why a paediatric dietitian is relevant here
Parents sometimes wonder why a dietitian is the right person to help with a gut-brain problem.
My role is not simply to change what your child eats.
It is to identify dietary factors that may be amplifying symptoms, address constipation, gut motility or gut dysfunction where present, and help families understand how the gut and nervous system interact so we can support recovery from both angles.
Diet is one lever. Understanding the full picture is the job.
When to seek specialist help
Tummy pain that affects daily life needs more than reassurance that tests are normal.
It is worth seeking specialist support if your child’s tummy pain is:
- Affecting school attendance or performance
- Preventing them from taking part in sport, activities or social events
- Causing significant anxiety around food or eating
- Leading to food restriction or a narrowing diet
- Occurring alongside sleep difficulties, including anxiety or worry at bedtime that delays sleep or affects overall sleep quality
- Not improving despite dietary changes and reassurance
The goal is not simply to manage symptoms.
The goal is to help your child get back to school, sport, sleepovers, birthday parties, and normal childhood life without their gut running the show.
What other families have experienced
One parent left this review after her son completed the programme:
We spent a year and a half trying to figure out why my son was having so many issues. After the first consultation with Bahee, she set us on a path that gave us immediate results. My son went from having terrible stomach pain several times a day to virtually none with her advice on diet and supplements. I underestimated how much those things mattered but Bahee was very kind with getting some very frustrated parents and 10 year old to some easily manageable solutions!
What structured support looks like
In my 12-week 1-to-1 clinical programme, the Happy Belly Club®, I work with families whose children have recurrent tummy pain, often after months or years of normal test results and unanswered questions.
Before any intervention is recommended, I look at the full picture.
The pattern of pain, the dietary history, the gut function, the school situation, the child’s anxiety levels, and what has already been tried.
That assessment often reveals a combination of factors that have not previously been considered together.
From there we work through the Happy Belly Formula.
Identify, Restore, Thrive.
Addressing the gut function and the gut-brain connection in the right sequence, so your child has the best chance of genuine recovery rather than ongoing symptom management.
If your child’s tummy pain is affecting their daily life and tests have come back normal, this is exactly the kind of situation we work with inside Happy Belly Club.
If you would like to understand whether this approach is right for your child, you can book a free 15-minute Discovery Call.
No pressure. Just a clear conversation about what is going on and whether I can help.
Frequently Asked Questions
Yes. When a child feels anxious or stressed, those signals travel directly to the gut through the gut-brain axis and alter how it functions. The gut becomes more sensitive. Normal digestive sensations can be felt as pain. This is called visceral hypersensitivity. The pain is completely real, not imagined.
Pre-school tummy pain is one of the most common presentations of gut-brain related abdominal pain in children. The anticipatory anxiety of the school day triggers the gut-brain axis, which amplifies gut sensitivity. The pain is real and the pattern is recognisable. It does not mean your child is making it up to avoid school.
Normal test results are reassuring but they do not mean nothing is wrong. They confirm the gut has no structural damage. Functional abdominal pain and disorders of gut-brain interaction cause real, daily pain without showing up on standard tests. Clinicians recognise these conditions and treat them with specific approach
No. Functional abdominal pain causes real changes in how the gut functions and how the brain processes pain signals. Anxiety can be one factor that amplifies symptoms, but it is not the whole picture. Many children with functional tummy pain are not clinically anxious. The gut-brain connection works in both directions, and gut symptoms can drive anxiety just as anxiety can drive gut symptoms.
Start by ruling out red flag symptoms with your GP. If tests come back normal, consider whether constipation, diet, anxiety, or gut-brain sensitivity might be contributing. If symptoms are affecting school, food, sleep or daily life, a structured assessment by a paediatric dietitian with expertise in gut-brain conditions is likely to be more helpful than further testing.
Bedtime tummy pain is common in children with gut-brain sensitivity. During the day, distractions reduce awareness of gut sensations. At night, when the mind quietens, worries surface and the gut-brain connection becomes more active. If your child has a sensitised gut, normal digestive sensations can feel more intense or uncomfortable than they would otherwise.
About the Author
Bahee Van de Bor is a Registered Paediatric Dietitian specialising in children’s digestive health. She presented at The European Society for Paediatric Gastroenterology Hepatology and Nutrition (ESPGHAN) in June 2026, on Nutritional Microbiome Therapies Post Antibiotics.
She has over 20 years of clinical experience, including 12 years working at Great Ormond Street Hospital.
Bahee works with families whose children experience constipation, diarrhoea, tummy pain and IBS-type symptoms through her clinical programme, the Happy Belly Club®.
If you are concerned about your child’s ongoing gut symptoms, you can learn more about the Happy Belly Club® or request a Discovery Call to discuss your child’s situation.
