Children with weak digestive function should hang up pediatric internal medicine or gastroenterology. 1. Pediatric Internal Medicine: It is a department that diagnoses and treats children’s diseases through medication, mainly treating diseases in children’s health care such as pediatric malnutrition, respiratory diseases such as bronchitis, digestive diseases such as dyspepsia, and urological diseases such as pediatric nephropathy. Children with weak digestive function may have symptoms of indigestion such as nausea and bloating and may go to the Department of Pediatric Internal Medicine. 2. Gastroenterology: It is a tertiary clinical discipline that studies diseases of the esophagus, stomach, small intestine, large intestine, liver, gallbladder and pancreas as its main content. Children with weak digestive function may have symptoms such as nausea, vomiting, diarrhea, abdominal distension, abdominal pain, constipation, loss of appetite, and emaciation, and may go to the Department of Gastroenterology for diagnosis and treatment. Children with weak digestive function are recommended to seek prompt medical attention for a clear diagnosis and targeted treatment under the guidance of a doctor.