Posted on: June 8, 2026
6 Common Causes of Bloating
Bloating is not fun. Most of us have experienced that uncomfortable feeling of suddenly looking six months pregnant after a meal, feeling swollen, uncomfortable, and just not quite ourselves. Bloating often comes along with other symptoms too — constipation, excess gas, abdominal discomfort, stomach pain, lower abdominal pressure, feeling overly full, and more.
The tricky thing about bloating is that it can happen for many different reasons, and sometimes more than one cause is happening at the same time.
Here are 6 of the most common causes of bloating that I commonly see in practice.
1. Eating Habits
Sometimes bloating has less to do with what you're eating and more to do with how you're eating. Eating too quickly, eating very large meals, drinking too much with meals, or not chewing food properly can all contribute to bloating. When we rush through meals, our digestive system may struggle to produce the appropriate amount of stomach acid and digestive enzymes needed to properly break down food. Eating quickly also increases the amount of air we swallow, which can lead to additional bloating and gas. Takeaway:
Practice more mindful eating. Try to avoid rushing meals, minimize large amounts of liquids during meals, and pay attention to portion sizes. One strategy I really like is the 5–10–15 Rule: • Take 5 deep belly breaths before eating
• Put your utensils down for 10 seconds between bites
• Make sure your meal takes at least 15 minutes to finish Small changes in eating habits can sometimes make a surprisingly large difference.
2. Stress
Your digestive system and nervous system are closely connected. When you're stressed, your body shifts into a "fight-or-flight" state. Blood flow is redirected away from digestion and toward your muscles and brain to prepare for perceived danger. Unfortunately, your body doesn't necessarily distinguish between running from a bear and answering stressful emails while eating lunch. Stress can slow digestion, alter stomach acid production, change gut motility, and even affect carbohydrate absorption in the small intestine, all of which can contribute to bloating. Takeaway:
Try not to eat when you are highly stressed, upset, or distracted. Stress management strategies may include: • Meditation or breath work
• Massage therapy
• Exercise or movement
• Talk therapy
• Creating more intentional meal environments Sometimes improving digestion starts with calming the nervous system.
3. Small Intestinal Bacterial Overgrowth (SIBO)
SIBO stands for Small Intestinal Bacterial Overgrowth and occurs when bacteria that normally belong in the large intestine begin overgrowing within the small intestine. This bacterial imbalance can lead to symptoms such as: • Bloating
• Constipation
• Diarrhea
• Excess gas
• Abdominal discomfort
• Heartburn
• Feeling overly full after meals SIBO has been associated with many cases of IBS-type symptoms and is often triggered after gastrointestinal infections or food poisoning. Takeaway:
If you experience ongoing bloating, especially alongside IBS symptoms, and notice you feel worse after probiotics or fibre supplementation, it may be worth discussing SIBO testing with your healthcare provider.
4. Gastrointestinal Infections (Parasites, H. pylori, and More)
Certain infections within the digestive tract can create chronic bloating and digestive symptoms. These may include: • Bloating and gas
• Abdominal pain
• Loss of appetite
• Belching
• Constipation or diarrhea
• Burning sensations or reflux symptoms Parasitic infections can sometimes occur after contaminated food or water exposure (particularly with travel), while H. pylori is a bacteria that can affect the stomach lining and is associated with ulcers and chronic stomach symptoms. Takeaway: If you developed digestive symptoms after travel, after a particular food exposure, or feel like you've "never been the same" since a specific illness or event, testing may be worthwhile. Persistent upper abdominal pain, burning, nausea, bloating, excessive belching, or appetite changes may warrant discussion about H. pylori testing with your healthcare provider.
5. Food Intolerances
Food intolerances are another very common contributor to bloating. Some of the more common triggers include: • Gluten-containing foods
• Dairy or lactose
• Fructose
• Soy products
• Certain vegetables or fermentable carbohydrates
• Individual food sensitivities Food intolerances do not always present dramatically. Sometimes they simply show up as ongoing bloating, discomfort, irregular bowel movements, fatigue, or feeling worse after certain meals. Takeaway: Consider trying a structured elimination approach. One common method involves removing potential triggers (such as gluten or dairy) for approximately 3 weeks before gradually reintroducing them one at a time while monitoring symptoms. Food tracking can often be more useful than guessing.
6. Imbalanced Gut Bacteria (Dysbiosis)
Your digestive tract contains trillions of microorganisms that play important roles in digestion, nutrient absorption, inflammation, immune function, appetite regulation, and even hormone metabolism. When the balance between beneficial and less beneficial bacteria becomes disrupted (called dysbiosis), digestive symptoms can develop. Common contributors include: • Antibiotic use
• Chronic stress
• Low stomach acid
• Poor dietary diversity
• Chronic digestive issues Takeaway: If digestive symptoms began after antibiotics or have become increasingly persistent, gut support may be helpful. Strategies often include: • Increasing probiotic-rich foods such as kimchi, sauerkraut, kefir, or yogurt
• Increasing prebiotic fibres that feed beneficial bacteria
• Considering probiotic supplementation when appropriate Remember: more probiotics is not always better, especially if certain conditions like SIBO are present.
Final Thoughts...
One of the biggest challenges with bloating is that causes frequently overlap. For example: Low stomach acid may contribute to bacterial overgrowth.
Stress may worsen gut motility.
Food intolerances may develop alongside gut imbalances. This is why digestive symptoms often benefit from an individualized approach rather than a one-size-fits-all solution.
If you struggle with chronic bloating, remember: feeling uncomfortable after every meal is not something you simply have to accept. Here's to happier digestion and less bloating.