13 days old baby, if the stomach grumbles, more consider the following causes: first of all, if the baby is not fed properly, there may be indigestion, coupled with its own baby digestive system, imperfectly developed, the stomach is horizontal, once the mother eats, spicy, stimulating, greasy difficult, digestive food, while feeding the baby too much, it will affect the baby’s digestive function. Secondly, the baby will also affect the digestive function after catching a cold or flu, and the symptoms of abdomen will appear. These two are the most common causes, which are less common, and also include some diseases of the gastrointestinal tract, such as intestinal obstruction. Therefore, parents need to pay attention to the mother should eat a diet rich in nutrients as well as light, pay attention to the baby’s warmth, to avoid catching a cold, cold, if this symptom, persistently does not ease, should promptly take the baby to the hospital, professional examination to exclude gastrointestinal diseases.