Bloating improves most reliably when you address what’s causing it, and for the majority of people, the cause comes down to one or more of these: swallowed air, gas from fermentation in the gut, or sluggish movement of gas through the intestines. The good news is that each of these has practical fixes, ranging from simple habit changes to targeted dietary shifts.
Why Bloating Happens in the First Place
Understanding the basic mechanics helps you pick the right fix. Bloating has several overlapping causes, and most people have more than one at play.
The first is excess gas production. Certain carbohydrates aren’t fully absorbed in the small intestine, so they travel to the colon where bacteria ferment them rapidly, producing gas that stretches the intestinal walls. Foods like beans, onions, cabbage, apples, wheat, and dairy (in people who don’t digest lactose well) are common culprits.
The second is impaired gas clearance. Even normal amounts of gas can cause problems if your gut doesn’t move it through efficiently. In one study, when gas was infused directly into the small intestine, 90% of people with irritable bowel syndrome developed bloating and distension, compared to only 20% of controls. The issue wasn’t more gas; it was slower transit through the small intestine.
The third is visceral hypersensitivity. Some people feel bloated without any measurable increase in abdominal size. Their gut nerves simply register normal gas volumes as uncomfortable or painful. This is especially common in people with functional digestive disorders.
And finally, there’s swallowed air. Eating quickly, using straws, chewing gum, and drinking carbonated beverages all introduce extra air into the digestive tract. This type of bloating tends to cause more belching and upper abdominal fullness.
Adjust How and What You Eat
The simplest starting point is slowing down at meals. Swallowing air during eating is surprisingly common and easy to fix. Chew each bite thoroughly before taking the next one, sip from a glass rather than a straw, and cut back on carbonated drinks. These changes alone can reduce upper-gut bloating noticeably within days.
Beyond eating habits, the specific foods you choose matter enormously. A low-FODMAP diet, which temporarily removes poorly absorbed carbohydrates that ferment in the gut, is the most studied dietary approach for bloating. Up to 86% of people with IBS report improvement in bloating, pain, and other digestive symptoms on this diet. The key food groups it limits include fructose-heavy fruits, lactose in dairy, wheat-based fructans, beans and lentils (which contain galacto-oligosaccharides), and sugar alcohols like sorbitol and mannitol found in sugar-free products.
A low-FODMAP diet isn’t meant to be permanent. It works as an elimination phase lasting two to six weeks, followed by systematic reintroduction of each food group so you can identify your personal triggers. In rechallenge trials, about 70 to 79% of sensitive individuals reacted to fructose and fructans specifically, while only 14% reacted to glucose, which served as a control. This means most people can eventually eat a wider diet once they know which categories bother them.
Get Moving, Even Lightly
Physical activity directly helps your gut clear trapped gas. In a study of patients with chronic bloating, researchers infused gas into the intestines and measured how much was retained during rest versus mild exercise (similar to a leisurely bike ride or brisk walk). During rest, 45% of the infused gas was retained, causing significant symptoms. During mild activity, retention dropped to 24%, and symptom scores fell along with it. Abdominal distension tracked closely with the volume of gas still sitting in the gut.
You don’t need intense exercise. A 10 to 20 minute walk after meals is enough to get intestinal gas moving. This is one of the most immediately effective things you can do when you’re already feeling bloated.
Peppermint Oil for Persistent Bloating
Enteric-coated peppermint oil capsules are one of the better-supported natural options. Peppermint oil relaxes the smooth muscle of the intestinal wall, which helps trapped gas pass and reduces the cramping sensation that often accompanies bloating. The enteric coating is important because it prevents the oil from releasing in the stomach, where it can cause heartburn.
In a four-week clinical trial, 83% of people taking peppermint oil reported moderate to marked improvement in distension, compared to just 29% on placebo. Flatulence, pain, and fullness also improved significantly. The typical dose used in studies is around 180 to 200 mg taken three times daily before meals, with a maximum of 540 mg per day.
Over-the-Counter Gas Relief
Simethicone, the active ingredient in products like Gas-X, works by reducing the surface tension of gas bubbles in the digestive tract. This causes small bubbles to merge into larger ones that are easier to pass through belching or flatulence. It doesn’t reduce the amount of gas your gut produces, but it helps you expel what’s there. Clinical trials show significant improvement in gas-related symptoms within five to ten days of regular use.
For bloating that’s specifically tied to beans, lentils, and certain vegetables, a digestive enzyme called alpha-galactosidase (sold as Beano) can help. It breaks down the complex sugars in these foods before they reach the colon, where bacteria would otherwise ferment them. In a randomized trial, this enzyme significantly reduced the number of days with moderate to severe bloating and decreased flatulence compared to placebo. You take it at the start of a meal containing trigger foods.
What About Probiotics?
Probiotics are widely marketed for bloating, but the evidence is more mixed than advertisements suggest. One well-studied strain, Bifidobacterium infantis 35624, showed clear benefits for bloating in earlier trials involving people with diagnosed IBS. However, a larger follow-up study in 275 people with bloating symptoms (but without a formal IBS diagnosis) found no significant difference in bloating severity between the probiotic and placebo groups after four weeks. The placebo group improved nearly as much as the probiotic group.
This doesn’t mean probiotics are useless. It does mean the benefit likely depends on what’s driving your bloating. If bacterial overgrowth or an imbalanced gut microbiome is part of your picture, probiotics may help. If your bloating is more about gas handling or sensitivity, they probably won’t make a noticeable difference. Trying a specific, well-researched strain for four weeks is reasonable, but if you don’t see improvement in that window, it’s worth moving on to other strategies.
Signs That Bloating Needs Medical Attention
Most bloating is uncomfortable but not dangerous. However, certain patterns warrant a visit to your doctor: bloating that gets progressively worse over weeks, persists for more than a week without improvement, or comes with persistent pain. Symptoms like unintentional weight loss, fever, vomiting, rectal bleeding, or signs of anemia (unusual fatigue, pallor) alongside bloating can signal conditions that need investigation beyond dietary changes.