A one-month-old baby’s tummy rumbling is caused by the baby’s increased intestinal peristalsis and hyperactive bowel sounds. If the baby does not have any clinical symptoms, it is a normal physiological phenomenon and no special treatment is needed. If the baby is accompanied by loss of appetite, nausea, vomiting or diarrhea, bloating, pay attention to whether the baby has a local cold or intestinal viral or bacterial infection, resulting in poor digestion. At this time, you should take your baby to the hospital for consultation and examination, laboratory tests for stool routine plus occult blood, and probiotic supplementation for your baby to regulate the gastrointestinal function. Pay attention to the management of diet and feeding, and feed small amounts and multiple meals. If breastfeeding, the mother should pay attention to avoiding the intake of foods that are easily allergic, such as milk, eggs, etc.