Understanding Gut Health and Anxiety in Kids

Have you ever noticed your child complaining of a stomachache before an important test at school or championship game? You're not imagining things, and you're definitely not alone. There's a powerful connection between our kids' guts and their brains that can help explain a lot of what you're seeing at home. 

Our expert, Dr. Lauren Potthoff, explains more about what could be going on and, more importantly, what you can do to help your child feel better.

The Gut and Brain Connection

As parents and caregivers, we often think of physical and emotional health as separate entities. However, these two aspects of health are intimately connected through what is called the "gut-brain axis." So, what happens in your child's mind can directly affect their gut, and vice versa. 

This connection is so strong that the gut is sometimes called our "second brain" because it has its own nervous system. When your child feels anxious or stressed, their brain sends signals down to their gut. And when their gut isn't happy, it sends messages right back up to the brain. It's a conversation that never stops, which explains why anxiety and stomach troubles often show up together.

Can anxiety really cause diarrhea in my child? 

The short answer is yes. When your child feels anxious or worried, their body goes into what we call "fight or flight" mode. Even though your child isn't running from a predator, their body doesn't know the difference between a math test and a real threat. Here's what happens during those anxious moments: 

1. Their body releases stress hormones like cortisol and adrenaline. 
2. Those hormones speed up digestion and can cause the muscles in their intestines to contract more quickly than usual.
3. As a result, everything moves through their system faster, which can lead to diarrhea, that urgent need to go to the bathroom or those uncomfortable stomach cramps. 

Many kids experience this before school performances, sports competitions or even just heading to school on Monday morning. If you've noticed this pattern with your child, it's their body's physical response to emotional stress. The good news is that once you recognize the pattern, you can start helping them manage both the anxiety and the tummy troubles. 

Stress and Your Child's Stomach: More Than Just Nerves 

You might be wondering, "Is stress really causing all these stomach problems, or is something else going on?" The truth is, stress can absolutely cause a wide range of gastrointestinal issues in children, and here's why. 

Chronic stress does several things to your child's digestive system. It changes how their gut moves and processes food, which can lead to constipation, diarrhea or that uncomfortable feeling of bloating. Stress also affects the balance of good and bad bacteria in their gut, something we call the "gut microbiome." A healthy microbiome is crucial for good digestion and overall health, but stress can throw it out of balance. 

Stress also makes the lining of the intestines more sensitive. This means your child might feel pain or discomfort more intensely than they would when they're relaxed and calm. It's like their gut's volume is turned way up. Stress can also increase inflammation in the digestive tract, which can cause a whole host of uncomfortable symptoms. 

So when your child says their stomach hurts and you can't find an obvious physical cause, stress might very well be the culprit. The pain is real, it's just coming from a different source than we might expect. 

Can it be something more serious? 

If your child has been dealing with recurring stomach pain, changes in bathroom habits, bloating or gas for several months, it might be more than just nerves. Irritable Bowel Syndrome, or IBS, is one of the most common digestive disorders we see in kids. 

IBS, sometimes better described as “functional gastrointestinal disorder” or a “disorder of brain-gut interaction” in children, might result in crampy abdominal pain, nausea, vomiting, diarrhea and/or constipation. It may be driven in part by abnormal function of the intestine or by increased nervous system response. 

Stress and anxiety are major triggers for IBS symptoms. What might feel like gentle movement to one child can feel painful to a child with IBS. In fact, many children with IBS notice their symptoms get worse during stressful times like exams, family changes, transitions, or social challenges. The gut microbiome also plays a role. Some children with IBS have different balances of gut bacteria compared to kids without IBS, and this can affect how their digestive system works. 

Food sensitivities can trigger symptoms too, though this varies from child to child. Some kids find that certain foods like dairy, gluten, fatty foods or high-fiber foods make their symptoms worse. And sometimes IBS symptoms start after a stomach bug or infection. Even after the infection clears up, the gut can remain sensitive and irritable for months afterward. 

How can I help my child? 

The good news is there's a lot you can do to help your child manage both their GI distress and anxiety. The connection between gut health and anxiety in kids is complex, but it's also something we can work with. By understanding what's happening in your child's body, recognizing the triggers, and using a combination of strategies that address both the physical and emotional aspects, you can help your child feel better. Here are some ways you can help manage your child’s symptoms: 

Start with the mind-body connection 

Teaching your child relaxation techniques can make a huge difference. Deep breathing exercises are simple but powerful. Try the "balloon breath" with younger kids: breathe in slowly through the nose like you're filling up a balloon in your belly, hold for a few seconds, then slowly let the air out through the mouth. Even just five minutes of this when they're feeling anxious can help calm both their mind and their gut.  

Create predictable routines 

Kids thrive on routine, especially when they're dealing with anxiety and digestive issues. Try to keep mealtimes consistent. Eating at regular times helps regulate digestion and can prevent some of the ups and downs that trigger symptoms. Make sure they're eating breakfast, even if it's something small. Skipping breakfast can lead to stomach problems later in the day. 

Build in bathroom time, especially in the morning. Having a calm, unhurried routine where they have time to use the bathroom before school can reduce anxiety about having to go during the day. Don't make it a big deal or add pressure, just build in the time and keep it relaxed.  

Pay attention to food 

While food doesn't cause anxiety, certain foods can make GI symptoms worse. Keep a simple food and symptom journal for a week or two. Write down what your child eats and any symptoms they have. You might start to see patterns that can help you and your child's doctor figure out if certain foods are triggers. 

Many kids with GI issues do better with smaller, more frequent meals rather than three large meals a day. This puts less stress on their digestive system. Make sure they're getting enough fiber from fruits, vegetables, and whole grains, but introduce it gradually. Too much fiber too quickly can actually make symptoms worse. Hydration is also crucial. Make sure your child is drinking water throughout the day, not just gulping it down at meals.  

Get moving together 

Physical activity is one of the best things for both anxiety and digestive health. Exercise releases endorphins, those feel-good chemicals that naturally reduce stress and anxiety. It also helps move things along in the digestive tract, which can ease constipation and bloating. You don't need to sign your child up for competitive sports, but a family walk after dinner or a bike ride on the weekend all can help. The key is finding movement they enjoy so it doesn't feel like another source of stress. 

Address the anxiety directly 

Sometimes the gut issues are a symptom of underlying anxiety that needs its own attention. Talk with your child about their worries in an age-appropriate way. Create a safe space where they can share their feelings without judgment. Sometimes just naming the anxiety and knowing you understand can help. Consider whether your child might benefit from talking to a counselor or therapist, especially if anxiety is significantly impacting their daily life.  

Work with your healthcare team 

Always keep your child's doctor in the loop. While the gut-brain connection is powerful, you want to make sure there isn't another underlying issue that needs treatment. Your doctor can help rule out other conditions, provide specific guidance for your child's situation, and may refer you to a pediatric gastroenterologist if needed. 

Don't hesitate to ask questions and advocate for your child. If your child is struggling with recurring stomach issues, anxiety, or symptoms that are affecting their quality of life, we're here to help. At Lurie Children's Hospital of Chicago, we understand that navigating gut health and anxiety challenges can feel overwhelming. Our dedicated team of pediatric gastroenterologists, psychologists and specialists work together to provide comprehensive, compassionate care tailored to your child's unique needs. 

Learn more about our division of pediatric gastroenterology. 

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