Most everyday bloating comes from gas in the gut, swallowed air, constipation or a food you don’t tolerate well. Eating smaller meals slowly, drinking enough water, getting regular movement, adding fibre gradually and limiting fizzy drinks and gassy foods usually helps. If bloating is frequent, persistent or comes with other symptoms, see your doctor.
What causes bloating
According to the NHS, the most common reason for bloating is having a lot of gas in your gut. That gas can come from certain foods and drinks (some vegetables and fizzy drinks, for example) or from swallowing air while you eat. Bloating can also be linked to digestive issues such as constipation, a food intolerance, celiac disease or irritable bowel syndrome (IBS), and some people feel bloated around their period.
It helps to think about bloating in three buckets:
- Air in: eating fast, talking while chewing, gulping drinks, chewing gum, drinking through straws.
- Gas made in the gut: bacteria in your large intestine ferment certain carbohydrates, such as those in beans, lentils, cabbage, onions and some fruits.
- Things moving slowly: constipation, large late-night meals and low activity.
Mealtime habits that reduce bloating
These changes cost nothing and often make the biggest difference.
- Eat more slowly. Put your fork down between bites and chew thoroughly. You’ll swallow less air and notice fullness sooner. Our guide to mindful eating has simple ways to slow down.
- Chew with your mouth closed. The NHS specifically suggests this to avoid swallowing air.
- Go for smaller, more frequent meals. One very large meal stretches the stomach and gives your gut more to process at once.
- Don’t eat a big meal late at night. Give yourself a couple of hours between your last large meal and lying down.
- Sit up straight while eating. Slouching can make you feel more uncomfortable.
Smart dietary adjustments
Add fibre gradually
Fibre prevents constipation, which is a common cause of bloating, but a sudden jump in fibre can cause more gas at first. Increase high-fibre foods slowly over a couple of weeks and drink more water as you do. If you’re constipated, the NHS suggests foods high in soluble fibre, such as oats and linseed (flaxseed).
Notice gas-producing foods
Beans, lentils, cabbage, broccoli, onions and some fruits are nutritious and worth keeping in your diet, but large portions can produce a lot of gas. Try smaller servings, spread them through the week, and rinse canned beans before using them.
Limit processed, salty and very fatty foods
The NHS advises against eating lots of processed, sugary, spicy or fatty foods when you’re prone to bloating. Salty foods can also make you retain water, which feels like puffiness. Cooking more meals at home makes this easier to control.
Watch your drinks
- Water first. Drinking plenty of water helps keep things moving, especially as you add fibre.
- Cut back on fizzy drinks, including pop and sparkling water, if they leave you feeling inflated.
- Go easy on caffeine, which the NHS lists among drinks to limit.
- Skip alcohol. The NHS lists it among drinks to cut down on when you’re prone to bloating, and leaving it out also supports sleep and weight goals.
- Try peppermint or ginger herbal tea after meals; many people find a warm herbal tea soothing.
Food intolerances: lactose and beyond
If bloating shows up after certain foods, an intolerance may be involved. Lactose intolerance is a common example. The NHS lists tummy pain, bloating, gas, rumbling and diarrhea or constipation among its symptoms, which can start anywhere from a few minutes to a few hours after eating lactose. Symptoms can often be prevented by eating smaller portions of lactose-containing foods or choosing lactose-free versions.
Other common culprits include fructose (in some fruits and high-fructose corn syrup) and sugar alcohols such as sorbitol in “sugar-free” gum and candy. The U.S. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) notes that a health care professional may suggest reducing lactose or fructose, or trying a low FODMAP diet for a few weeks, depending on the cause.
A low FODMAP diet is restrictive and meant to be short-term, with foods reintroduced afterward. It works best with guidance from a registered dietitian rather than on your own. If you suspect an allergy rather than an intolerance, see our article on food allergies.
Keep a simple food and symptom diary
For two weeks, jot down:
| Time | What you ate and drank | Portion | Bloating (0–5) | Notes |
|---|---|---|---|---|
| 12:30 | Bean salad, sparkling water | Large bowl | 3 | Ate quickly at desk |
| 18:00 | Chicken, rice, carrots, water | Normal | 1 | Walked after dinner |
Patterns usually show up within a week or two. Bring the diary to your doctor or dietitian if you need more help; it saves a lot of guesswork.
Lifestyle habits that help
- Move regularly. The NHS notes that exercise improves digestion and can help both prevent bloating and ease it when you feel bloated. A 10–15 minute walk after meals is a good start.
- Keep regular bowel habits. Don’t ignore the urge to go, and aim for consistent meal times.
- Try a gentle belly massage. The NHS suggests massaging your stomach from right to left to help release trapped wind.
- Reduce swallowed air. Limit chewing gum and drinking through straws.
- Support your gut bacteria with a variety of plant foods and, if you tolerate them, fermented foods like yogurt and kefir. Our gut health guide explains more.
When to check with a professional
Bloating is common and usually harmless, but don’t ignore it if it’s persistent. The NHS advises seeing a doctor if you:
- Feel bloated regularly, or keep feeling bloated after changing your diet.
- Have bloating along with unintentional weight loss.
- Notice blood in your stool.
Get urgent care if bloating comes with vomiting, a high temperature, a lump or swelling in your abdomen, being unable to pass stool or gas, or sudden severe abdominal pain. Bloating that doesn’t go away can occasionally be a sign of something more serious, which is why ongoing symptoms deserve a proper check.
Key takeaways
- Eat smaller meals slowly, chew with your mouth closed and avoid big late-night meals.
- Increase fibre gradually and drink plenty of water.
- Limit fizzy drinks, caffeine and very processed or fatty foods; skip alcohol.
- Use a two-week food and symptom diary to spot your personal triggers.
- Walk after meals and keep regular routines.
- See your doctor for frequent, persistent or worrying bloating.
FAQ
How quickly can I get rid of bloating?
Bloating from a large meal or swallowed air often eases within a few hours, especially if you take a gentle walk. Bloating linked to constipation or an intolerance usually improves over days to weeks once you address the cause.
Should I cut out beans and vegetables?
Usually not. They’re valuable sources of fibre and nutrients. Try smaller portions, build up slowly and see how your body responds before removing anything.