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Digestive Condition

Bloating
What's Actually Causing It and Why It Keeps Coming Back

Bloating is the most common digestive complaint in India, and also one of the most misunderstood. The standard advice is to eat slower, avoid fizzy drinks, and cut out beans. But if you're bloating daily regardless of what you eat, or if your abdomen distends visibly through the day even when you haven't eaten much, something more specific is going on. Persistent bloating is almost always a sign of gut dysfunction, not just dietary indiscretion.

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Dr. Chhavi Bansal Bloating Treatment
Dr. Chhavi Bansal
Homeopathic Physician · HomeoSure
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Quick Answer

Bloating has multiple possible causes: excess gas production by gut bacteria fermenting undigested carbohydrates (FODMAPs), impaired gas transit due to dysfunctional gut motility, visceral hypersensitivity where the gut perceives normal gas volumes as painful, small intestinal bacterial overgrowth (SIBO), lactose or fructose malabsorption, coeliac disease, or gastroparesis. In many people, more than one mechanism is at play simultaneously. Diet helps manage symptoms, but if bloating is persistent and severe, the underlying gut physiology needs attention.

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Daily bloating despite a careful diet usually means a gut physiology problem, not a food problem. Book a consultation with Dr. Chhavi Bansal today.

The Mechanisms Behind Bloating

Bloating happens when excess gas accumulates in the gut or when the gut's ability to tolerate normal gas volumes is reduced. These are different problems with different solutions.

Gas production happens when gut bacteria ferment carbohydrates that weren't absorbed in the small intestine. In a healthy gut, most carbohydrates are absorbed before reaching the colon. But if absorption is impaired (lactase deficiency, coeliac disease, SIBO) or if bacteria are in places they shouldn't be (SIBO again), fermentation happens earlier and more aggressively.

Gas transit is the other side. Gas produced in the gut needs to move through and be expelled or reabsorbed. In people with slow gut motility, gas accumulates because it can't move through quickly enough. In people with visceral hypersensitivity, even normal gas volumes feel painful and produce a sense of distension that's out of proportion to the amount of gas present.

Common Symptoms Beyond Distension

💨 Visible abdominal distension, often worse from morning to evening
🤕 Abdominal discomfort or cramping associated with fullness
😮‍💨 Excessive belching after meals
💩 Flatulence, often with relief of discomfort
🌀 Gurgling sounds (borborygmi) from gas movement
😔 Feeling of fullness even after small meals (early satiety)
🔄 Bloating that worsens through the day and eases overnight
😣 Discomfort or tightness in clothing by evening

SIBO: The Most Commonly Missed Cause

Small intestinal bacterial overgrowth is one of the most under-investigated causes of chronic bloating in India. The small intestine is supposed to be relatively bacteria-free; its primary job is absorption, not fermentation. When bacteria colonise the small intestine in large numbers, they ferment carbohydrates within 30-60 minutes of eating, producing gas far earlier than normal colonic fermentation would.

The result is bloating that comes on quickly after meals, often before the food has even reached the colon. SIBO frequently occurs after gut infections, following antibiotic use, in people with slow gut motility, and in those with structural gut issues. It's diagnosed with hydrogen and methane breath testing, which is widely available but rarely ordered in routine workups.

Causes of Chronic Bloating to Investigate
  • SIBO (Small Intestinal Bacterial Overgrowth) - hydrogen/methane breath test
  • Lactose intolerance - lactose breath test or elimination trial
  • Fructose malabsorption - fructose breath test
  • Coeliac disease - anti-tTG IgA serology
  • IBS with visceral hypersensitivity - symptom pattern and history
  • Gastroparesis (delayed gastric emptying) - gastric emptying study
  • Dysbiosis - detailed symptom and dietary pattern assessment
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Patient Story

A Real Recovery Story

"

Preethi had been bloated every single day for two years. She'd cut out dairy, then gluten, then legumes, then onions. Her abdomen would distend visibly by evening no matter what she ate. Her gastroscopy was normal. No one had investigated SIBO or her gut motility. When hydrogen breath testing showed significant SIBO and her case history revealed slow transit, treatment targeting both the bacterial overgrowth and motility changed things substantially within three months. She now eats most foods without issue."

P
Preethi K.
Patient · Chennai · treated at HomeoSure
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Common Questions

Frequently Asked Questions: Bloating

Bloating from diet is driven by fermentation of specific carbohydrates (FODMAPs) by gut bacteria. But how much gas is produced and how uncomfortable it feels depends on more than just what you eat. The composition of your gut microbiome determines how aggressively carbohydrates are fermented. The speed of your gut transit affects whether gas has time to be reabsorbed or moves through. Visceral hypersensitivity determines whether you feel the gas as painful or uncomfortable when others might not. And SIBO means bacteria that should be in the colon are in the small intestine, where they ferment things much earlier in digestion. All of these persist regardless of diet.
SIBO stands for Small Intestinal Bacterial Overgrowth. The small intestine normally has relatively few bacteria; most gut microbiome activity happens in the colon. In SIBO, bacteria colonise the small intestine in high numbers, fermenting carbohydrates much earlier in digestion (in the small intestine rather than the colon) and producing gas much more rapidly. This causes bloating, distension, and often diarrhoea or constipation within 30-60 minutes of eating. SIBO is diagnosed with hydrogen and methane breath testing. It's underdiagnosed because breath testing isn't routine in most gastroenterology workups. It responds well to targeted treatment when properly identified.
Most bloating is uncomfortable but not dangerous. But there are warning signs that warrant prompt investigation: bloating with unexplained weight loss, bloating with blood in stool, new-onset bloating after age 50 (especially in women, where ovarian pathology should be excluded), persistent bloating that's getting progressively worse, or bloating with a palpable abdominal mass. Bloating that waxes and wanes and has been present for years without other red flag symptoms is almost always functional rather than sinister, but the red flags above deserve urgent workup.
Yes. Lactose intolerance means the small intestine doesn't produce enough lactase enzyme to digest lactose (milk sugar). Undigested lactose reaches the colon, where bacteria ferment it and produce hydrogen and methane gas. This causes bloating, cramping, and often diarrhoea, typically 30 minutes to 2 hours after consuming dairy. Lactose intolerance is extremely common in India (affecting 60-70 percent of people to varying degrees) and is a frequently missed cause of bloating in people who consume dairy regularly. It's easily tested with a lactose breath test or confirmed by a strict dairy elimination trial.
FODMAPs (Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols) are types of carbohydrates that are poorly absorbed in the small intestine and rapidly fermented by gut bacteria. A low-FODMAP diet restricts these foods to reduce substrate available for bacterial fermentation. It reduces bloating in around 70 percent of IBS patients during the restriction phase. The key point: low-FODMAP is a diagnostic and symptom-management tool, not a permanent eating pattern. The goal is systematic reintroduction to identify your specific trigger foods, then eat everything else normally. Staying on full restriction long-term reduces gut microbiome diversity, which has its own downstream consequences.
Yes, through the gut-brain axis. Stress activates the autonomic nervous system in ways that slow gastric emptying, alter gut motility, and change gut permeability. It also increases visceral sensitivity, meaning the gut feels gas and movement more intensely. People who experience bloating that's clearly worse during stressful periods and better on relaxed days are seeing this mechanism in action. But stress being a trigger doesn't mean stress is the only cause. The underlying gut physiology still matters, and treating the gut alongside stress management produces better outcomes than treating either alone.

Bloating that doesn't respond to diet changes?

Persistent bloating despite dietary restriction usually means the root cause is gut dysfunction, not food choice alone. Book a consultation to investigate what's actually happening.

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