Your intestines make noise because muscles in your digestive tract are squeezing food, liquid, and gas through a long, hollow tube. The medical term for these rumbles and gurgles is borborygmi, and in most cases they’re a completely normal sign that your gut is working. A healthy digestive system produces somewhere between 5 and 30 of these sounds per minute, most of them too quiet to hear without a stethoscope.
How Your Gut Produces Sound
Your stomach and intestines are wrapped in layers of smooth muscle that contract in coordinated waves, pushing contents forward. These contractions are triggered by electrical signals, similar to a pacemaker rhythm, that ripple through the muscle wall. As food, digestive juices, and pockets of gas get squeezed through narrow openings and around bends, they create the rumbling and gurgling you hear. Think of it like squeezing air and water through a long, flexible hose: the turbulence produces sound.
The louder and more frequent the noises, the more gas or liquid is being moved around. Anything that increases the volume of gas in your gut, speeds up contractions, or changes the consistency of your intestinal contents will make the sounds more noticeable.
Why Your Stomach Growls When You’re Hungry
The classic empty-stomach growl isn’t actually about hunger itself. It’s caused by something called the migrating motor complex, a housekeeping wave of contractions that sweeps through your stomach and small intestine roughly every 90 to 120 minutes when you haven’t eaten. Its job is to clear out leftover food particles, mucus, and bacteria between meals.
Because there’s very little food to muffle the movement, these contractions push mostly air and small amounts of fluid, which makes noticeably louder sounds. Research tracking gut sounds alongside these cleaning cycles found that sound intensity in both the upper and lower abdomen rises and falls in sync with the contractions. The stomach’s squeezing action also appears to push gas into the small intestine, amplifying the noise further. Once you eat, food fills the space and dampens the vibrations, which is why the growling usually stops after a meal.
Foods and Habits That Make It Worse
Certain foods generate more gas during digestion, and more gas means louder intestines. The biggest culprits are fermentable sugars and fibers that your small intestine can’t fully break down. Bacteria in your large intestine ferment them instead, producing hydrogen, methane, and carbon dioxide in the process. Common triggers include:
- Beans and lentils, which contain raffinose, a sugar humans lack the enzyme to digest
- Cruciferous vegetables like broccoli, cabbage, and Brussels sprouts
- Dairy products, especially if you have any degree of lactose intolerance
- Fruits high in fructose, such as apples, pears, and mangoes
- Sugar alcohols (sorbitol, xylitol) found in sugar-free gum and candy
- Carbonated drinks, which introduce gas directly
Swallowing excess air, a condition called aerophagia, also plays a significant role. Chewing gum, drinking through straws, eating quickly, and talking while eating all increase the amount of air entering your digestive tract. Under normal circumstances, people pass gas up to about 20 times a day. With significant air swallowing, that number climbs, and so does the volume of intestinal noise along the way.
How to Quiet Things Down
Most intestinal noise doesn’t need treatment, but if the gurgling is loud enough to embarrass you in meetings or keep you up at night, a few straightforward changes can help.
Chewing your food more thoroughly does double duty. It breaks food into smaller pieces so your stomach has less mechanical work to do, and it reduces the amount of air you swallow with each bite. Eating more slowly has the same effect. If you tend to inhale meals in five minutes, simply slowing to 15 or 20 minutes can make a noticeable difference in both noise and post-meal bloating.
Cutting back on the high-fermentation foods listed above, or introducing them gradually so your gut bacteria can adjust, reduces gas production. Smaller, more frequent meals also help by keeping some food in your system to dampen the empty-stomach cleaning cycles. Avoiding gum and straws eliminates two of the easiest sources of swallowed air. And staying upright for 20 to 30 minutes after eating helps gas move through more predictably rather than pooling in one spot and gurgling.
When Intestinal Sounds Signal a Problem
Noisy intestines alone are rarely a cause for concern. But the character of the sounds, or their absence, can sometimes point to something worth investigating.
Very high-pitched, tinkling sounds that come in waves alongside cramping or bloating can be a sign of a partial bowel obstruction. The intestine is trying to force contents past a narrowing, and the squeezed gas produces a distinctive metallic quality that’s different from normal rumbling. If these sounds come with severe pain, vomiting, or an inability to pass gas or stool, that’s a situation that needs prompt medical attention.
A completely silent abdomen is also meaningful. Normal guts are never truly quiet. If bowel sounds disappear entirely for a prolonged period, it can indicate an ileus, where the intestinal muscles temporarily stop contracting. This sometimes happens after abdominal surgery or with certain infections and electrolyte imbalances.
People with irritable bowel syndrome (IBS) tend to have a different sound profile than people without it. Research comparing bowel sounds between the two groups found that people with IBS had significantly different sound amplitudes and burst patterns, reflecting changes in gut motility, water content, and gas levels. Interestingly, overall sound density was actually lower in the IBS group, suggesting that the issue isn’t necessarily more noise but rather altered patterns of contractions. If your intestinal noises come paired with chronic pain, diarrhea, constipation, or alternating between the two, those accompanying symptoms are worth discussing with a doctor, not the noise itself.
What’s Normal and What Isn’t
The short version: if your intestines gurgle and you feel fine otherwise, everything is working as designed. A healthy gut makes roughly 5 to 30 sounds per minute, and most of them happen without you ever noticing. You tend to hear them more when you’re hungry, after a big meal, when you’re stressed (stress hormones speed up gut motility), or when you’ve eaten something gassy.
The sounds worth paying attention to are the ones that come with other symptoms. Pain, persistent bloating, unexplained weight loss, bloody stool, or a dramatic change in your bowel habits all matter more than the volume of your gut’s soundtrack. The noise on its own is just your digestive system doing its job.