Psychosomatics
Stomach Pain Without a Diagnosis: What's Happening in Your Child's Body
Blood work normal, ultrasound clear - but the pain is there. What the nervous system has to do with it and why your child isn't faking it.
Three doctor visits, two blood draws, one ultrasound. Everything unremarkable. Yet your child doubles over in pain every morning. The doctor says: "There's nothing wrong organically." But what does that mean for the pain your child experiences every day?
Functional abdominal pain - the medical term - affects up to 20 percent of school-age children. "Functional" means the pain processing itself is the problem, not a diseased organ. The nervous system in the gut has changed - and this change is measurable, real, and treatable.
The gut brain - 100 million nerve cells in the digestive tract
The gastrointestinal tract contains the enteric nervous system - an independent nerve network with over 100 million nerve cells. It regulates digestion, bowel movements, and pain perception largely independently from the brain. In children with functional abdominal pain, this system has become hypersensitive: Normal digestive processes - stomach rumbling, bowel movements, gas formation - are perceived as pain.
The mechanism works like an amplifier turned up too high: The signal strength is normal, but the processing is cranked up. Stress, anxiety, or past gastrointestinal infections can trigger this hypersensitivity - and maintain it.
The following conversations are taken directly from the app - uncut and unedited.
User question
My child always has stomach pain but the doctor can't find anything
Rehavio (Parents)
Your child's stomach pain is real and distressing - even when tests show nothing. This is not imaginary.
In functional abdominal pain, the nervous system in the gut has become hypersensitive. Your child perceives normal digestive processes as pain. It's like an amplifier turned up too high - normal signals are perceived as painful.
The enteric nervous system - the "gut brain" with over 100 million nerve cells - communicates constantly with the brain. In your child, these nerve pathways are overactivated. Stress, anxiety, or past gastrointestinal infections can trigger this hypersensitivity.
What's especially frustrating for your child: Nobody can see from the outside how much it hurts. The pain often comes in waves, sometimes without any recognizable trigger. Perhaps your child avoids certain activities or is afraid of the next pain episode.
The good news: The nervous system can calm down again. Warmth, belly massages, relaxation techniques, and a structured daily routine help many children. What matters most is that your child feels understood - the pain is not an excuse or imagination.
This response is from Rehavio. You can ask your own questions - about your situation.
Somatic markers - how the body stores experiences
Neuroscientist Antonio Damasio described a phenomenon that plays a central role in children with chronic stomach pain: Somatic markers. The body stores emotional experiences as physical signals. If your child once sat in school with stomach pain, the nervous system links "school" with "stomach pain." Next time, just thinking about school is enough to activate the same pain pathways.
This is not a conscious process. The connection runs below conscious awareness - faster than any rational thought. In a 10-year-old, the prefrontal cortex - the brain region that cognitively processes emotions - is not yet fully developed. The child cannot rationally override the stored pain marker.
User question
What are somatic markers?
Rehavio (Parents)
Somatic markers are body signals that help us make decisions. Your body stores experiences as physical feelings - a "gut feeling" in the literal sense.
When your child faces a situation they've experienced before, the body sends a lightning-fast signal: A queasy feeling in the stomach warns of something unpleasant. A warm feeling in the chest signals something positive. This happens before the brain consciously thinks.
In children with chronic stomach pain, these markers can become overactive. The body has "learned" that certain situations - school, certain foods, stress - are associated with pain. Then it sends precautionary alarm signals, even when no real danger is present.
This explains why your child might already get stomach pain just thinking about school. The somatic marker "school = stomach pain" has become ingrained. This isn't faking - the body actually activates the same pain pathways.
These markers can change again. New, positive experiences overwrite old warning patterns. That's why it's important to help your child collect positive experiences despite the pain.
Why "It's nothing" makes the pain worse
When children hear that "nothing was found," they draw an obvious conclusion: Nobody believes me. This invalidation creates additional stress - and stress activates exactly the pain pathways that are already hypersensitive. A vicious cycle emerges: Pain → doctor visit → "no findings" → uncertainty → more stress → more pain.
The gut-brain axis - the bidirectional communication between the digestive tract and the brain - explains this connection. Emotional distress changes bowel movements, the composition of gut flora, and the sensitivity of pain receptors in the abdomen. The gut responds to stress - and the brain responds to gut signals. Both directions are equally real.
User question
Is my child imagining the pain?
Rehavio (Parents)
No, your child is not imagining the pain. It is neurophysiologically real.
When your child says "My stomach hurts," pain neurons in their nervous system are actually firing. The same brain areas are active as with pain from a visible cause. Your child is experiencing real, measurable pain.
The difference: In functional pain, the pain processing system itself has become hypersensitive. Imagine someone turning the volume on a radio all the way up - normal sounds become unbearably loud. Similarly, your child's nervous system amplifies normal body signals into pain.
Your child cannot "switch off" this pain or "toughen up." It takes just as much courage for your child to go to school with this pain as it does for a child with a broken arm.
The frustration of "nobody believes us" is something many parents know. Normal blood values don't mean "nothing is wrong." They mean: The cause lies in pain processing, not in the organs. This doesn't make the pain any less real or less in need of treatment.
What your child needs most: For you to take their pain seriously. This gives them security in a situation they don't understand themselves.
A bright spot
Functional abdominal pain in children is highly treatable. The nervous system that amplifies the pain can calm down again - especially when children understand what's happening in their body. In pediatric rehabilitation, doctors, psychologists, and therapists work together to break the pain cycle. Relaxation techniques, physical activity, and working on somatic markers change how the nervous system processes signals. Children who understand their body gain the ability to act - and that changes everyday life.
Rehavio explains chronic conditions in age-appropriate language - what happens in the body, why therapies help, and how rehab works. Whether for yourself, as a parent, or as a professional.
