Quick answer: Constant bloating is not normal. The most common causes include small intestinal bacterial overgrowth (SIBO), food intolerances, low stomach acid, gut microbiome imbalance, and stress-driven digestive dysfunction. Identifying your specific cause through structured assessment is essential — generic advice to “eat more fibre” can actually make some types of bloating worse.
Is it normal to be bloated every day?
No. Occasional mild bloating after a large meal is normal. But if you’re bloated every day, or bloating significantly after most meals, something is driving it that needs investigation. Many people have normalised their bloating because they’ve had it so long — but it’s always a signal that your digestive system needs support.
What are the most common causes?
SIBO (small intestinal bacterial overgrowth): Bacteria migrate into the small intestine where they ferment carbohydrates prematurely, producing gas within 30–60 minutes of eating. SIBO is now recognised as an underlying driver in a significant proportion of IBS diagnoses.
Low stomach acid: Surprisingly common, particularly over age 40 or with long-term PPI use. Without adequate acid, proteins aren’t broken down properly, minerals aren’t absorbed, and pathogens aren’t neutralised — all of which contribute to bloating and reflux.
Food intolerances: Delayed immune reactions to specific foods (distinct from allergies) can cause bloating hours or days after consumption. Common triggers include gluten, dairy, eggs, and FODMAPs.
Gut dysbiosis: An imbalance between beneficial and pathogenic gut bacteria alters fermentation patterns and gas production. This is often the result of antibiotic use, poor dietary diversity, or chronic stress.
Stress: The gut-brain axis means that chronic stress directly impairs digestive secretions, slows motility, and alters microbiome composition — all of which cause bloating.
Why does generic advice often make bloating worse?
“Eat more fibre” is the most common dietary advice for digestive issues — but if you have SIBO, increasing fibre feeds the bacterial overgrowth and makes bloating significantly worse. Similarly, fermented foods (often recommended for gut health) can exacerbate histamine-related bloating. This is why identifying the specific cause matters before changing your diet.
References: Pimentel, M., et al. (2020). ACG clinical guideline: small intestinal bacterial overgrowth. American Journal of Gastroenterology, 115(2), 165–178.
Samantha Jane
Samantha is a qualified naturopath with over 20 years of health industry experience, based in Lane Cove on Sydney’s North Shore. She is a member of the Australian Traditional Medicine Society (ATMS).
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