How Your Mind’s Stress Shows Up in Your Gut
By Jenny Peterson
If stress or anxiety has ever sent you reaching for the Tums, you’re far from alone. The gut-brain connection is a very real interaction with sensitivity between your central nervous system and your entire gastrointestinal tract.
“Stress heightens the response to normal digestive processes, sending inappropriate pain signals to the brain, a condition we call ‘visceral hypersensitivity,’” explains Dr. Derek Feussner with Palmetto GI. “The nervous system that surrounds your stomach, small bowel and colon is known as the enteric nervous system. As a G.I. physician, I think of this as your ‘second brain.’”
When stress and anxiety take hold, the body activates its fight-or-flight response. That hormonal cascade can alter how the gut processes food and communicates pain, leading to a range of uncomfortable symptoms like acid reflux, indigestion, abdominal pain after eating and changes in stool consistency.
“It’s important to be aware of this close interaction, since stress, anxiety, grief and depression will almost certainly manifest in negative GI symptoms, which will then feed back, leading to worsening mental health, creating a vicious cycle that can be challenging to break,” Dr. Feussner said.
And the cycle doesn’t only go one way: Gut issues can also influence mental health, comfort in socializing and impact quality of life.
“It’s a two-way street,” Dr. Feussner said.
The result is a body that feels out of sync — where emotional stress becomes physical discomfort and physical discomfort amplifies emotional stress.
In the stomach, a stress response can show up as cramping after meals, nausea, heartburn, or even spasms that cause sharp pain in the upper abdomen.
Once food moves into the small bowel, stress-related dysregulation can lead to bloating, gas, urgency, incomplete digestion and malabsorption. When it reaches the colon, symptoms often shift to diarrhea, constipation and lower abdominal pain caused by muscle spasms.
Breaking that cycle starts with small, intentional steps to support both mind and body.
Natural Ways to Support the Gut-Brain Connection
Awareness of regular sources of stress and finding ways to manage that stress, including evaluating and setting healthy boundaries in interpersonal relationships, can help improve the mind-gut connection.
Daily habits like exercise, stretching or walking can help regulate stress levels.
Mindfulness practices, including meditation and yoga, can also calm the nervous system. Apps such as NERVA offer guided sessions specifically designed to support G.I. health with targeted breathing and meditation.
Diet plays a major role, too. Reduce ultra-processed foods and instead focus on whole, nutrient-dense foods such as fruits and vegetables high in soluble fiber, along with lean proteins like fish and chicken. Hydration is equally important, as is moderating alcohol intake.
When to Seek Help
Gut symptoms that require more urgent attention include nausea with vomiting, difficulty swallowing, unexplained weight loss, debilitating abdominal pain or blood in or on the stool.
“You should always seek help from a G.I. specialist when symptoms begin to interfere with your quality of life,” Dr. Feussner said. “As a G.I. specialist, it is my job to listen and begin to understand exactly what is going on with your gut and tailor a treatment plan aimed at getting to the underlying cause of your symptoms,” he said.
That may include testing for inflammation or infections, evaluating for bacterial overgrowth in the small intestine or using endoscopic exams such as EGD and colonoscopy to get a closer look at the digestive tract.
Imaging studies can assess the stomach, pancreas, gallbladder and lower G.I. tract, while motility testing can help determine how well the gut is moving. In some cases, specific medications may be recommended to target underlying issues.
Advanced Testing and Personalized Care
Palmetto G.I. is one of the few practices in South Carolina with the advanced testing and expertise to evaluate disaccharidase enzyme deficiencies in the small bowel — an often-overlooked cause of food intolerances that can disrupt the gut-brain connection.
Specialists’ sole focus is to dig deeper into the root causes of digestive issues, rather than relying on a one-size-fits-all approach.
Ultimately, caring for your gut means caring for your mind, and vice-versa. Making time for daily movement and mindfulness, removing negative situations and other stressful interactions, eating a varied diet rich in whole foods, staying hydrated, limiting alcohol and prioritizing sleep can all work together to keep that two-way street in balance.
