Most stomach bloating comes from excess gas produced during digestion, and you can usually reduce it significantly by changing what and how you eat. The fixes range from immediate physical relief to longer-term dietary adjustments, depending on whether your bloating is occasional or chronic.
Why Bloating Happens
Gas in your intestines is mostly produced by gut bacteria digesting carbohydrates through fermentation. When too many carbohydrates pass through your stomach and small intestine without being absorbed, bacteria further down the line ferment them, producing gas that stretches your intestinal walls. That pressure is what creates the tight, swollen feeling.
Not all bloating is gas, though. Fluid retention causes a different kind of fullness, often driven by high salt intake or hormonal shifts. And sometimes the issue isn’t that you’re producing too much gas but that gas is moving through your system too slowly, getting trapped along the way. Knowing which type you’re dealing with helps you pick the right approach.
Quick Relief for Trapped Gas
When you’re bloated right now and want relief, movement is your best tool. A simple walk can help push intestinal gas through your digestive tract and reduce abdominal pressure. If walking isn’t enough, lying on your left side can help release trapped gas, since it positions your colon in a way that encourages gas to move toward the exit.
Specific body positions work even better. The wind-relieving pose (lying on your back and pulling your knees to your chest) puts gentle pressure on your abdomen and helps get gas moving. Child’s pose, where you kneel and fold forward with your arms extended, compresses your abdomen while relaxing your hips. Twisting at the waist, whether through a seated twist or a supine spinal twist, pushes gas through the digestive tract by compressing different sections of the colon in sequence. Gently rubbing your stomach in a clockwise direction (following the path of your colon) can also help.
Over-the-counter simethicone (the active ingredient in Gas-X) works by breaking up gas bubbles in your stomach and intestines so they’re easier to pass. It won’t prevent new gas from forming, but it can ease the discomfort you’re feeling right now.
Stop Swallowing Extra Air
A surprising amount of bloating comes not from what you eat but from air you swallow without realizing it. This is called aerophagia, and it adds gas to your stomach before digestion even begins. Common culprits include eating too fast, talking while eating, chewing gum, sucking on hard candy, drinking through straws, and drinking carbonated beverages. Smoking also increases air swallowing.
If your bloating tends to hit in the upper stomach and you find yourself burping frequently, air swallowing is likely a factor. Slowing down at meals and cutting out gum and straws can make a noticeable difference within days.
Identify Your Food Triggers
Certain carbohydrates are poorly absorbed in the small intestine, leaving them to ferment in the colon. These are grouped under the acronym FODMAPs, and they include onions, garlic, beans, lentils, many wheat products, dairy (specifically lactose), high-fructose fruits like apples and watermelon, stone fruits, ripe bananas, and sugar alcohols used as artificial sweeteners.
A low-FODMAP elimination diet is the most structured way to identify which foods cause your bloating. You remove all high-FODMAP foods for two to six weeks, then reintroduce them one category at a time, watching for symptoms. Most people don’t react to every category. The goal is to find your specific triggers so you can eat as broadly as possible while avoiding the foods that cause you problems. This process works best with guidance from a dietitian, since the diet is restrictive and not meant to be permanent.
Even without a full elimination protocol, keeping a simple food diary for two weeks, noting what you eat and when bloating hits, can reveal patterns. Many people discover that one or two foods are responsible for most of their discomfort.
Manage Fiber Carefully
Fiber is essential for digestive health, but adding too much too quickly is one of the most common causes of new or worsening bloating. Your gut bacteria need time to adjust. Michigan Medicine recommends adding no more than 5 grams of fiber per day and waiting two weeks before increasing again.
The type of fiber matters, too. Inulin, found in many “fiber-enriched” processed foods and supplements, tends to cause significant gas and bloating. Psyllium, methylcellulose, and acacia fiber are better tolerated. Wheat dextrin may also cause less gas than other supplements. If you’re eating a high-fiber diet, make sure you’re drinking enough water, particularly caffeine-free fluids. Fiber absorbs water in the colon, and without enough fluid, it can slow things down and make bloating worse rather than better.
Avoid sugar-free products that contain artificial sweeteners like sorbitol, mannitol, and xylitol. These are sugar alcohols (a type of FODMAP) and are notorious for causing gas and bloating.
Hormonal Bloating
If your bloating follows a monthly pattern, peaking in the days before your period, hormonal fluid retention is the likely cause. When estrogen spikes and progesterone drops in the second half of your cycle, your body holds onto more water. This type of bloating feels different from gas: more of a general puffiness, often in the abdomen, hands, and feet.
Limiting salt intake in the week before your period can reduce how much water your body retains. Regular aerobic exercise helps, as does magnesium supplementation, which some research suggests can ease premenstrual water retention. Relaxation techniques like yoga and meditation may also reduce overall PMS severity. Prescription diuretics are an option for severe cases, but they shouldn’t be combined with anti-inflammatory painkillers like ibuprofen or naproxen, since taking both together can cause kidney damage.
Peppermint Oil for Chronic Bloating
Enteric-coated peppermint oil capsules have solid evidence for reducing bloating, particularly in people with irritable bowel syndrome. In one trial, 64% of participants taking peppermint oil saw at least a 50% reduction in their overall symptom score after four weeks, compared to 34% on placebo. The benefits persisted even four weeks after stopping. Typical doses in clinical studies range from 187 to 225 mg taken two to three times daily, 30 minutes before meals. The enteric coating matters because it prevents the oil from releasing in the stomach, where it can cause heartburn, and delivers it to the intestines where it relaxes smooth muscle and reduces spasms.
Probiotics: Modest but Real Benefits
Probiotics can help with bloating, though the effects are modest. A meta-analysis of 23 trials involving over 2,500 people with IBS found that probiotics significantly improved bloating and flatulence compared to placebo. The number needed to treat was 7, meaning roughly one in seven people who try probiotics will see meaningful improvement beyond what a placebo would provide.
The strains with the most evidence include several Bifidobacterium species (particularly B. lactis, B. longum, and B. bifidum) and Lactobacillus strains (L. acidophilus, L. plantarum, L. rhamnosus). Multi-strain products tend to have more evidence behind them than single-strain supplements. Give any probiotic at least four weeks before deciding whether it’s working.
When Bloating Signals Something Deeper
Occasional bloating after a large meal or around your period is normal. Bloating that’s persistent, worsening, or accompanied by other symptoms can point to conditions that need medical evaluation. Small intestinal bacterial overgrowth (SIBO) occurs when bacteria from the colon migrate into the small intestine, causing excessive fermentation and persistent bloating. It overlaps heavily with IBS, though SIBO tends to be more bloating-predominant while IBS is more pain-predominant. Diagnosing SIBO typically involves a breath test, though these tests have limited accuracy.
A gradual buildup of fluid in the abdominal cavity, called ascites, is usually caused by liver disease and sometimes by kidney or heart failure. This produces a different kind of swelling: progressive, firm, and not related to meals. Bloating paired with unintended weight loss, blood in your stool, persistent vomiting, or a firm lump in your abdomen warrants prompt medical attention, as these can indicate conditions beyond simple digestive gas.