Stomach gurgling is the sound of gas, liquid, and partially digested food being squeezed through your intestines by rhythmic muscle contractions. It’s a normal part of digestion, and in a healthy adult, your gut produces somewhere between 5 and 35 of these sounds per minute. Most of the time, a gurgly stomach just means your digestive system is doing its job. But certain foods, habits, and conditions can turn up the volume.
What Makes the Sound
Your digestive tract is essentially a long, muscular tube. Rings of smooth muscle along the walls contract in coordinated waves, pushing contents forward. As food, digestive juices, and pockets of air get squeezed through narrow openings between sections of your gut, they produce the rumbles and gurgles you hear. The medical term for these sounds is borborygmi, and they happen whether you’ve just eaten or haven’t eaten in hours.
Why an Empty Stomach Is Often Louder
When your stomach has been empty for a while, your gut doesn’t just sit idle. It launches a cleaning cycle called the migrating motor complex, a pattern of strong, sweeping contractions that moves through the stomach and small intestine roughly every 90 to 120 minutes. This cycle has four phases, and the third phase is the noisy one: a burst of regular, high-amplitude contractions designed to push leftover food particles, bacteria, and debris toward the colon.
A hormone called motilin triggers these contractions. As motilin levels rise in your blood, it sets off a feedback loop with serotonin in the lining of your small intestine, amplifying the signal until those strong phase III contractions kick in. Because there’s no food to muffle the movement, the sounds travel more clearly through your abdomen. This is why your stomach seems loudest during a meeting or a quiet room: it’s literally housekeeping.
Foods and Sweeteners That Increase Gas
Certain carbohydrates are poorly absorbed in the small intestine and get fermented by bacteria in the colon, producing gas that amplifies gurgling. The biggest culprits fall into a few categories:
- Sugar alcohols found in sugar-free gum, candy, and protein bars. Sorbitol and mannitol can cause noticeable gurgling and gas at doses as low as 10 to 20 grams per day. Xylitol at 50 grams significantly increases nausea, bloating, and stomach rumbling. Even maltitol, commonly used in sugar-free chocolate, causes mild gurgling and gas at around 40 grams.
- Beans and legumes contain raffinose and stachyose, sugars that human enzymes can’t break down. Gut bacteria ferment them instead, producing hydrogen gas.
- High-FODMAP foods like onions, garlic, wheat, and certain fruits contain short-chain carbohydrates that draw water into the intestine and feed gas-producing bacteria.
- Carbonated drinks introduce carbon dioxide directly into the stomach, adding to the gas that sloshes around during digestion.
If you’ve recently switched to more sugar-free products or added more beans to your diet, that’s a likely explanation for the uptick in noise.
Swallowed Air Adds Volume
Every time you swallow, a small amount of air goes down with your food or saliva. Normally this is minimal, but certain habits dramatically increase the amount. Eating too fast is one of the most common causes. Chewing gum, drinking through straws, and talking while eating also push extra air into your stomach. In extreme cases, a pattern called aerophagia can lead people to swallow enough air to belch up to 120 times an hour (compared to a normal rate of about 10) and pass gas well beyond the usual 20 times per day. Slowing down, chewing thoroughly, and swallowing one bite before taking the next can noticeably reduce the gurgling that comes from excess air.
Your Position Matters
If you notice your stomach is louder when you’re lying down, there’s a straightforward physical reason. Research measuring intestinal gas movement found that in the upright position, gas moves through and exits the gut much faster. Standing subjects cleared about 72% of a gas load in 60 minutes, compared to only 49% when lying on their backs. Supine subjects also retained significantly more gas: about 146 milliliters trapped in the intestines at the 60-minute mark versus just 13 milliliters when upright.
Gas naturally rises, so when you’re lying flat, it can pool in loops of intestine rather than moving steadily toward the exit. That pooling and intermittent release creates more audible gurgles. If nighttime or post-meal gurgling bothers you, staying upright for 20 to 30 minutes after eating gives your gut a chance to move gas through more efficiently.
When Gurgling Points to a Digestive Condition
Louder or more frequent bowel sounds can accompany functional digestive conditions like irritable bowel syndrome and dyspepsia (chronic indigestion). In IBS, the gut’s motility patterns are disrupted, meaning contractions may be stronger, more frequent, or less coordinated than usual. This creates more turbulent movement of gas and fluid, and the sounds follow. Small intestinal bacterial overgrowth, where bacteria that belong in the colon colonize the small intestine, can also increase gas production and amplify gurgling after meals.
On its own, gurgling is almost never a sign of something serious. The sounds become worth investigating when they come with other symptoms that persist over weeks. Ongoing abdominal pain or cramping after meals, unintentional weight loss, frequent nausea or vomiting, significant changes in bowel habits (new diarrhea or constipation), or bloating that doesn’t resolve are all signs that the gurgling may be part of a bigger picture. One case study described a woman with two years of prominent stomach noises alongside nausea, cramping after large meals, and a 10-kilogram (22-pound) weight loss, which turned out to have a structural cause visible on imaging.
Simple Ways to Quiet Things Down
Most stomach gurgling responds well to basic changes. Eating at regular intervals prevents the loud cleaning cycles that ramp up during long fasts. Smaller, more frequent meals keep the stomach from being completely empty without overloading it. Slowing your eating pace and chewing thoroughly reduces the amount of air you swallow. Cutting back on sugar alcohols, carbonated drinks, and high-gas foods like beans and cruciferous vegetables lowers the raw material your gut bacteria have to work with.
Staying upright after meals helps gas move through faster. Light walking after eating has a similar effect, gently encouraging the normal forward motion of your intestines. If you suspect a specific food is the trigger, keeping a simple food diary for a week or two often reveals a clear pattern, especially with sugar-free products that are easy to overlook as a cause.