Borborygmi, the rumbling and gurgling sounds your stomach and intestines make, are completely normal. A healthy gut produces anywhere from 5 to 30 audible clicks, gurgles, and rumbles per minute as part of routine digestion. These sounds happen because your digestive tract is a muscular tube constantly squeezing and pushing food, liquid, and gas forward, and that movement naturally creates noise.
What Causes the Sounds
Your digestive system never truly stops moving. Waves of muscular contractions travel along the walls of your stomach and intestines, pushing contents forward. As food mixes with digestive fluids and pockets of gas get squeezed through narrow passages, the result is the gurgling and rumbling you hear (or feel). Think of it like the sound water makes moving through pipes. The louder or more frequent the sound, the more gas or fluid is being pushed around at that moment.
Why Your Stomach Growls When You’re Hungry
Hunger growling isn’t actually your stomach being “empty” in the way most people imagine. Between meals, your digestive system runs a cleaning cycle called the migrating motor complex. This cycle repeats every 80 to 120 minutes during fasting. Most of that time, the muscles are relatively quiet. But for about 5 to 8 minutes per cycle, a burst of strong, sweeping contractions moves through your stomach and small intestine, clearing out leftover food particles, mucus, and bacteria.
Because there’s less food to muffle these contractions, the sounds travel more easily. That’s why you tend to hear your stomach more when you haven’t eaten in a while. The hormone motilin drives these fasting contractions, and the cycle stops as soon as you eat, replaced by the gentler mixing contractions of active digestion.
Foods That Make It Louder
More intestinal gas means louder, more frequent borborygmi. Certain foods are well-known gas producers because they contain carbohydrates that your small intestine can’t fully break down. Bacteria in your large intestine ferment whatever’s left over, producing gas in the process. Common triggers include:
- Beans and lentils
- Cruciferous vegetables like broccoli, cauliflower, cabbage, and Brussels sprouts
- Dairy products if you have any degree of lactose intolerance
- Fructose from certain fruits, soft drinks, or sweetened products
- Sugar alcohols like sorbitol, found in sugar-free gum and candies
- Carbonated drinks including soda and beer
What triggers gas varies from person to person. A food that causes loud rumbling in one person may cause none in another, largely depending on individual gut bacteria and enzyme levels.
Lactose Intolerance and Borborygmi
If your stomach seems to growl loudly and consistently after dairy, lactose intolerance is a likely explanation. When your body doesn’t produce enough of the enzyme that breaks down lactose (the sugar in milk), that undigested lactose passes into your large intestine, where bacteria ferment it rapidly. This produces gas and draws extra water into the intestine through osmotic pressure. The combination of excess gas and fluid moving through your gut creates noticeable rumbling.
Borborygmi is reported in virtually 100% of people with lactose intolerance, alongside bloating, abdominal pain, and flatulence. Diarrhea occurs in about 70% of cases, and nausea in about 78%. If you notice a pattern of loud gut sounds within a few hours of consuming milk, cheese, or ice cream, a period of dairy avoidance can help you identify whether lactose is the culprit.
When Borborygmi Signals a Problem
On their own, even loud or frequent gut sounds are rarely a sign of anything serious. What matters is whether they come with other symptoms. Pay attention if you notice borborygmi alongside persistent abdominal pain, bloating that doesn’t resolve, unexplained weight loss, chronic diarrhea, blood in your stool, or fever. These combinations can point to conditions like Crohn’s disease, ulcerative colitis, food allergies, or infectious enteritis.
One specific pattern is worth knowing about. Very high-pitched, almost tinkling bowel sounds can be an early sign of a bowel obstruction, where something is physically blocking the intestine. The gut muscles contract harder trying to push contents past the blockage, creating unusually sharp, loud sounds. If those high-pitched sounds are followed by a period of complete silence (no gut sounds at all), that can indicate the obstruction has become severe. This scenario typically comes with significant pain, vomiting, and an inability to pass gas or have a bowel movement.
Reduced or absent bowel sounds also have meaning. During sleep, quieter gut sounds are perfectly normal. But persistently absent sounds while awake, especially after abdominal surgery or with constipation, can indicate that intestinal movement has slowed significantly. Opioid medications, general anesthesia, and certain other drugs are common causes of this slowdown.
Reducing Noisy Digestion
If borborygmi is more of a social annoyance than a medical concern, a few practical adjustments can help. Eating smaller, more frequent meals keeps food in your digestive tract more consistently, which muffles the cleaning-cycle contractions that cause hunger growls. Eating slowly and chewing thoroughly reduces the amount of air you swallow, which means less gas to produce noise later.
Cutting back on carbonated drinks eliminates a direct source of swallowed gas. If specific foods like beans or cruciferous vegetables seem to be triggers, reducing portion sizes of those foods (rather than eliminating them entirely) often makes a noticeable difference. For people with confirmed lactose intolerance, lactase enzyme supplements taken before dairy consumption can reduce symptoms including borborygmi.
Stress and anxiety can also increase gut motility, making sounds louder and more frequent. This is a real physiological effect, not imagined. Your gut has its own extensive nerve network that responds directly to stress hormones, speeding up contractions when you’re anxious. This is one reason your stomach may seem especially loud during a quiet meeting or exam.