Pediatric anorexia is also known as digestive disorders. The main symptoms include vomiting, loss of appetite, diarrhea, constipation, bloating, abdominal pain, and blood in the stool. These symptoms not only reflect functional or organic diseases of the digestive tract, but also often appear in other systemic diseases, especially in central nervous system diseases or mental disorders and various infectious diseases. Therefore, it is necessary to take a detailed medical history, closely observe the changes in the condition, and make a correct diagnosis and treatment of the primary disease.