The rumbling sound that comes from your stomach when you’re hungry is called borborygmi. It is caused by the movement of food, gas, and fluid through your digestive tract.

When you eat, your stomach and intestines contract to move food along. These contractions are called peristalsis. Peristalsis is what moves food from your mouth to your stomach, and then from your stomach to your small intestine.

When your stomach is empty, the contractions are still there, but there is no food to move. This causes the stomach to make a rumbling sound.

The rumbling sound is louder when your stomach is empty because there is no food to muffle the noise. The sound is also louder if you have gas in your stomach.

Borborygmi is a normal bodily function and is nothing to be alarmed about. However, if you are experiencing frequent or severe borborygmi, it is important to see a doctor to rule out any underlying medical conditions.

Here are some other possible causes of stomach growling:

• Anxiety or stress: When you are anxious or stressed, your body releases hormones that can cause your stomach to contract.
• Indigestion: Indigestion can cause your stomach to make gurgling or rumbling noises.
• Irritable bowel syndrome (IBS): IBS is a chronic digestive disorder that can cause a variety of symptoms, including stomach growling.
• Food allergies or intolerances: If you have a food allergy or intolerance, eating certain foods can cause your stomach to make gurgling or rumbling noises.
• Gastroparesis: Gastroparesis is a condition that affects the movement of food through your stomach. It can cause your stomach to make gurgling or rumbling noises.

If you are concerned about stomach growling, it is important to talk to your doctor. They can help you determine the cause of the growling and recommend treatment options, if necessary.