The Vagus Nerve, Digestive Health, Abdominal Pain, and a Possible Connection After Induction
As chiropractors, we often meet people who are struggling with digestive issues, abdominal discomfort, reflux, constipation, bloating, colic, feeding challenges, or unexplained abdominal pain. Many have tried changing foods, supplements, medications, and routines, yet the problem persists. Let’s be clear – chiropractors do not treat these symptoms.
One piece of the puzzle that is often overlooked is the nervous system—specifically the vagus nerve.
Understanding how the vagus nerve influences digestion can help explain why some babies, children, and adults experience digestive challenges, and why some parents report changes after difficult births, prolonged labor, assisted delivery, or induction.
What Is the Vagus Nerve?
The vagus nerve is the tenth cranial nerve and is one of the most important communication pathways between the brain and the body.
Heidi Haavik often describes the nervous system as the master coordinator of the body’s ability to adapt, regulate, and heal. The vagus nerve is a major component of that regulation.
The vagus nerve:
- Begins in the brainstem
- Travels through the neck
- Connects to the heart
- Connects to the lungs
- Connects to the stomach
- Connects to the liver
- Connects to the pancreas
- Connects to much of the small and large intestine
Approximately 80% of vagal fibers carry information from the body back to the brain, while about 20% carry instructions from the brain to the body.
This means the brain is constantly listening to what is happening in the digestive system.
The Vagus Nerve and Digestion
The vagus nerve helps regulate:
- Stomach acid production
- Digestive enzyme secretion
- Gallbladder function
- Intestinal movement
- Nutrient absorption
- Swallowing
- Peristalsis
- Appetite regulation
- Feelings of fullness
- Gut-brain communication
When vagal tone is healthy, digestion tends to be more efficient.
When vagal tone is challenged, people may experience:
- Bloating
- Constipation
- Reflux
- Slow digestion
- Gas
- Nausea
- Abdominal discomfort
- Food sensitivities
- Feeding difficulties in infants
This doesn’t mean the vagus nerve is the only cause, but it can be a contributing factor.
The Vagus Nerve and the Stress Response
The vagus nerve is a key player in the parasympathetic nervous system—the “rest, digest, heal, and repair” branch of the nervous system.
When we feel safe, the body can:
- Digest food
- Absorb nutrients
- Repair tissues
- Build resilience
When the body perceives stress, the sympathetic nervous system becomes more dominant.
In this state:
- Blood flow shifts away from digestion
- Digestion slows
- Muscle tension increases
- Gut motility can become altered
- Inflammation may increase
This is one reason many people notice digestive symptoms worsen during periods of stress.
The nervous system does not separate emotional stress, physical stress, inflammatory stress, sleep deprivation, or birth stress. It simply responds to the load placed upon it.
Could Birth Interventions Influence the Vagus Nerve?
This is where the conversation becomes particularly interesting.
Birth is a profound neurological event.
Most babies transition beautifully. However, some births involve:
- Long inductions
- Very rapid inductions
- Strong contractions from medications
- Prolonged labor
- Assisted delivery
- Forceps
- Vacuum extraction
- Cesarean birth
- Fetal positioning challenges
Research has shown that birth forces can influence the biomechanics of the upper neck and cranial structures. This is one reason pediatric chiropractors often pay close attention to the craniocervical junction—the area where the skull meets the upper neck.
The vagus nerve exits the skull through an opening called the jugular foramen near the occiput and upper cervical region.
From a chiropractic perspective, tension patterns involving:
- The occiput
- Temporal bones
- Upper cervical spine
- Surrounding muscles and fascia
may influence neurological regulation.
It is important to note that while this concept is widely discussed within pediatric chiropractic and cranial chiropractic circles, direct evidence linking induction specifically to vagus nerve dysfunction remains limited. The relationship is currently more theoretical and clinical than conclusively proven.
Why Might Induction Matter?
Induced labor frequently produces stronger and more closely spaced contractions than spontaneous labor.
For some babies, this may create additional mechanical and physiological stress during birth.
Some clinicians have observed that babies who experienced:
- Long inductions
- Failed inductions
- Rapid inductions
- Prolonged pushing phases
may later present with:
- Feeding difficulties
- Reflux
- Colic
- Constipation
- Excessive crying
- Difficulty settling
- Head preference
- Torticollis
- Abdominal tension
The exact mechanisms are still being investigated.
Potential contributors may include:
- Birth stress
- Upper neck tension
- Cranial strain patterns
- Altered autonomic regulation
- Feeding challenges
- Sleep disruption
Again, these associations do not prove causation, but they provide areas worth exploring clinically.
Signs of Possible Vagal Dysregulation
In babies, some signs may include:
- Difficulty latching
- Clicking while feeding
- Reflux
- Colic
- Gassiness
- Constipation
- Difficulty settling
- Frequent startling
- Shallow breathing
- Poor sleep
In children and adults, signs may include:
- Chronic constipation
- Bloating
- Abdominal pain
- Reflux
- Anxiety
- Difficulty relaxing
- Poor stress tolerance
- Chronic tension
- Sleep challenges
Supporting Vagal Function Naturally
A healthy nervous system thrives on input.
Strategies that may support vagal tone include:
Movement
Movement provides powerful sensory input to the brain.
Examples include:
- Walking
- Crawling patterns
- Cross-crawl exercises
- Swimming
- Yoga
- Breathing exercises
Diaphragmatic Breathing
The diaphragm and vagus nerve work closely together.
Slow breathing may help support parasympathetic activity.
Singing, Humming, and Chanting
The vagus nerve influences muscles involved in vocalization.
Activities such as:
- Singing
- Humming
- Chanting
- Gargling
are commonly used to stimulate vagal pathways.
Nutrition
Healthy digestion requires adequate:
- Protein
- Healthy fats
- Minerals
- Hydration
Blood sugar instability can also increase stress responses that may affect digestive function.
Sleep
Sleep is one of the most powerful regulators of nervous system function.
Chiropractic Care
From a neurospinal perspective, chiropractic care aims to improve communication between the brain and body by reducing areas of spinal and neurological interference.
Research has shown chiropractic adjustments can influence brain function and sensory processing. While chiropractic care is not a treatment for digestive disease, many chiropractors observe changes in regulation, comfort, movement, sleep, feeding, and overall function when the nervous system becomes more adaptable.
The Bigger Question
Perhaps the most important question is not:
“What is wrong with the stomach?”
But rather:
“How well is the nervous system regulating the digestive system?”
Digestion does not happen in isolation.
It depends on:
- Brain function
- Vagal tone
- Breathing
- Movement
- Sleep
- Nutrition
- Emotional regulation
- Spinal function
Whether we are talking about a newborn who experienced a long induction, a child with recurrent abdominal pain, or an adult struggling with chronic digestive issues, the nervous system deserves a place in the conversation.
At One Village Family Chiropractic Community, we view digestion through a neuroregulation lens. We ask how the brain and body are communicating, how adaptable the nervous system is, and whether there may be areas of tension, stress, or interference affecting the body’s ability to regulate itself.
Because digestion is not simply about food.
It is about communication.
And communication in the body begins with the nervous system.
Dr. Wendy Coburn
One Village Family Chiropractic Community
Serving families, babies, children, athletes, and adults in Edmonton through neurologically focused chiropractic care, prenatal and pediatric chiropractic, neuroregulation, and wellness-focused care.