If the baby has an intolerance to milk, milk protein intolerance or milk protein allergy, and the breastfeeding mother drinks milk, the baby will be prone to bloating, abdominal pain, or diarrhea and other digestive symptoms. So mothers pay attention to observe, if every time the baby drinks milk the baby will have digestive symptoms, suggesting that the baby may indeed be intolerant to milk protein. It is also necessary to monitor whether the mother has eaten any other special food besides milk when the baby has bloating and flatulence. Especially high protein foods, such as fish, shrimp, crab, eggs, nuts, etc., because this type of food, are prone to intolerance or allergy of the little baby. This will affect the function of the digestive tract and make the baby develop a series of digestive symptoms.