The rumbling sound in the stomach occurs primarily due to the movement of air, food, and liquids in the digestive tract as a result of muscle contractions around the stomach and intestines. This process, called peristalsis, pushes the contents through the gastrointestinal system. When the stomach is empty, these sounds become louder because the air and gas move in an empty space, creating amplified noises. Stomach rumbling is a normal body function indicating the digestive system is working well, and it often signals hunger as the stomach muscles contract more strongly when empty. Additionally, swallowing air while eating or talking, digestion of certain foods that produce gas, and natural processes such as the migrating motor complex in the intestines can contribute to these sounds. Stomach rumbling can also be influenced by factors like diet, stress, and gastrointestinal health but is generally not a symptom of any disease unless accompanied by other troubling symptoms like pain or discomfort.