Chronic Constipation: Types, Causes and Functional Medicine Solutions
Constipation is one of the most common digestive complaints, yet it is frequently dismissed or inadequately addressed. Here is what is actually driving it and what can be done.
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Chronic Constipation: Types, Causes and Functional Medicine Solutions
Constipation is one of the most common digestive complaints, yet it is frequently dismissed or inadequately addressed. Here is what is actually driving it and what can be done.
What Is Constipation and How Do You Know If You Have It
Constipation is characterised by difficult, infrequent, or incomplete bowel movements, typically with small, hard stools. While it is often thought of as simply not going often enough, the experience varies considerably from person to person.
A useful clinical tool for identifying constipation is the Bristol Stool Chart. Stools matching types 1 or 2 on the chart, described as hard, lumpy, and difficult to pass, are consistent with constipation. Ideally, bowel movements should occur daily to support optimal digestive health and effective toxin elimination.
The Three Types of Constipation
Understanding which type of constipation is present is essential to selecting the right approach. There are three primary mechanisms:
Normal transit constipation Stool moves through the colon at a typical rate, but the person still experiences difficulty evacuating, hard stools, bloating, and abdominal discomfort. This is the most common presentation.
Slow transit constipation Stool moves too slowly through the large intestine, resulting in infrequent bowel movements, a reduced sense of urgency, and straining. This type is often associated with reduced gut motility and nervous system dysregulation.
Dyssynergic constipation Also known as pelvic floor dysfunction, this occurs when the muscles and nerves of the pelvic floor fail to coordinate properly during a bowel movement. A practitioner skilled in pelvic muscle rehabilitation can be highly effective for this presentation, as pelvic floor therapy addresses the underlying tension, weakness, or coordination issues directly.
Common Causes of Chronic Constipation
Insufficient hydration, fibre, and movement
These three foundations underpin bowel regularity for most people.
Dehydration leads to harder, drier stools that are more difficult to pass. Aiming for 2.5 to 3 litres of filtered water daily is a practical starting point for most adults.
Dietary fibre bulks the stool and promotes peristalsis. A target of 25 to 30 grams per day from sources such as psyllium husk, vegetables, legumes, and modified citrus pectin supports regularity and feeds beneficial gut bacteria.
Movement stimulates gut motility. Approximately 150 minutes of moderate intensity aerobic exercise per week has been shown to support bowel function, with even a daily walk making a meaningful difference.
Small intestinal bacterial overgrowth
Small intestinal bacterial overgrowth, commonly known as SIBO, is a frequently overlooked driver of constipation. Excess bacteria in the small intestine disrupt normal gut motility, produce excessive gas, and slow stool transit. SIBO can be evaluated through non-invasive breath testing, and management typically involves a combination of dietary modification, targeted herbal or pharmaceutical therapy, and probiotic support under the guidance of a practitioner.
Structural factors
Some individuals have anatomical variations such as a redundant or tortuous colon that contribute to constipation by slowing transit or causing stool to become trapped in loops. Abdominal massage and biofeedback therapy can both support bowel movement and help manage these structural patterns.
Gut brain axis dysregulation
The gut and brain communicate constantly through a bidirectional pathway known as the gut brain axis. Chronic stress impairs gut motility and can significantly worsen constipation. Practical strategies that support this connection include time in nature, regular meditation practice, breathwork, and cognitive behavioural therapy for stress and anxiety driven digestive symptoms.
The vagus nerve connection
The vagus nerve plays a central role in gut motility. Chronic stress and nervous system dysregulation can reduce vagal tone, slowing gut movement and contributing to constipation. Techniques that stimulate vagal activity include deep diaphragmatic breathing, humming or singing, cold exposure, gargling, and certain forms of massage and acupuncture.
This is an area where the intersection of chiropractic care, neuroscience, and functional medicine is particularly relevant, as nervous system assessment and treatment can directly support gut function.
Constipation as a Warning Sign
Chronic constipation is not always a standalone issue. It can be an early indicator of underlying conditions including hypothyroidism, diabetes, and neurological conditions such as Parkinson's disease. A thorough functional medicine assessment considers these possibilities and investigates root causes rather than simply managing symptoms with laxatives.
A Functional Medicine Perspective
At Wave Functional Health, gut health is one of the most common areas we assess in patients presenting with a wide range of symptoms, from fatigue and hormonal concerns to brain fog and immune dysfunction. The gut is central to virtually every system in the body, and chronic constipation is rarely just a digestive issue in isolation.
If you have been managing constipation for months or years without resolution, a comprehensive functional assessment may identify the underlying drivers that have been missed.