Accumulation of food, i.e. indigestion, pure breastmilk may cause indigestion in children. Infant’s gastrointestinal function in about 6 months after birth began to develop gradually, 3 ~ 4 years old digestive system can be well developed, breast milk is rich in protein and oligosaccharide and other nutrients, if the intake of excessive, may increase the burden on the stomach and intestines of infants and young children, caused by abdominal bloating, diarrhea, constipation, abdominal pain and other indigestion symptoms. It is recommended to pay attention to the amount of intake when breastfeeding exclusively, with the growth of infants and young children, under the guidance of the doctor to add complementary foods. Children with indigestion are advised to consult a doctor for a clear diagnosis and targeted treatment.