Early Life Stress Leaves a Mark on Your Digestion

If you have spent years fighting stomach discomfort, unexplained stomach pain, or digestive problems that have no visible physical cause, the answer may not be what you ate last week. But what you experienced the first few years of your life.

While the connection between stress and digestion has been well understood for a long time, most people have experienced butterflies in the stomach before a big presentation or a churning stomach during a stressful time, new scientific evidence suggests that early childhood experiences may have a permanent impact on the way the digestive system works.

This impact is so subtle that most people will never make the link. The connection between the brain and the stomach is a two-way street. The two work together constantly, ensuring that the health of the stomach and the brain is inextricably linked. This connection works all the time, constantly affecting the way a person feels.

The Gut-Brain Connection

The gut and the brain are constantly in communication. This two-way communication ensures that the health and wellbeing of the gastrointestinal system and the central nervous system are inextricably linked.

This is the reason why, for example, stress makes your stomach queasy, anxiety makes your stomach churn, and grief makes your stomach hurt. The reason for this is that the brain and the gut are not separate entities. They are interdependent. In fact, the gut has been named the second brain because it contains over 100 million nerve cells and produces the same chemicals as the brain, such as serotonin.

Researchers have now confirmed that early life stress, during and after birth, may shape the development of the brain and may lead to the development of mental health problems such as anxiety and depression. The same researchers have now confirmed that the gut is shaped by early life stress and is just as vulnerable.

A Landmark New Study

A major study published in March 2026 in the journal Gastroenterology has provided the clearest picture yet of this connection.¹

As per researchers, stress in early life may lead to gut problems later on, possibly due to changes in the gut and sympathetic nervous system. According to a study by Kara Margolis, doctor of the NYU Pain Research Center, stressors can affect a child’s development and can lead to gut issues down the line.

Researchers studied information collected on almost 12,000 US children involved in the NIH-funded Adolescent Brain Cognitive Development study. After examining adverse childhood experiences (like abuse, neglect, and parental mental health problems), experts found that any type of early childhood stress increased gastrointestinal symptoms.

The Mental Well-Being of Mothers Is More Important than Ever

One of the most profound discoveries relates to the time period before a child is born. A study on more than 40,000 babies in Denmark, tracked through age 15, showed that maternal depression was associated with children having an increased risk of several gut disorders, including nausea, constipation, colic, and irritable bowel syndrome.

Blame is not the objective. An emotionally distressed mother during pregnancy is not failing her baby. However, research strongly supports the treatment of maternal mental health support as a medical necessity that should not be pursued as an optional extra.

Health Conditions Can Follow Us into Adulthood

Experiencing stress early in life may trigger long-term gut issues by altering communication between the gut and brain, which has links to pain, constipation, and irritable bowel syndrome. Functional gastrointestinal disorders involve the gut not functioning properly despite no evident damage seen on scans or tests. This problem is not uncommon among those who experience childhood adversity.

Irritable bowel syndrome is the most well studied one and affects roughly one in ten people all over the world. Chronic pain, bloating, and unpredictable bowel habits are everyday realities for millions of adults who have never linked those symptoms to childhood events. Many will spend years swapping medications and going on elimination diets looking for a physical cause that standard tests miss.

Not One Treatment Fits All

New tests showed that different symptoms have different pathways from the gut.  According to Margolis, this implies that targeting different biological pathways may be required for different symptoms.

Patients who were unsuccessfully treated for a condition multiple times suffer the ramifications. Rather than utilizing generic protocols that impute diagnoses, a more effective approach may be one that is personalized in consideration of childhood adversity as well as symptoms.

What You Can Do

If you are experiencing problems with digestion, it is certainly something worth bringing up with your doctor, including whether or not your early years of life were stressful or difficult. Therapies that address the connection between the brain and the gut, including cognitive behavioral therapy, gut-directed hypnotherapy, and mindfulness-based stress reduction, have all proven effective in the treatment of various functional gastrointestinal disorders.

The gut has a long memory, and while it is easy to forget about the effects of early life stress, the 2026 study published in Gastroenterology¹, based on data from tens of thousands of children, makes it clear: Early life stress rewires the connection between the brain and the gut, leading to real problems with digestion.

This is a call to take the problem of gut health seriously, have compassion for those who are suffering but have no clear cause, and take the health of mothers and children as seriously as it should be taken.

Disclaimer: This content is for general informational purposes only and should not replace professional medical advice. Always consult a qualified healthcare provider with any questions about your health or treatment options.

References

1. NYU | Early life stress linked to long term gut issues