The following types of diseases are common in pediatrics: i. Respiratory system diseases, commonly include acute upper respiratory tract infection, acute bronchitis, bronchopneumonia, bronchial asthma, or cough variant asthma, pulmonary tuberculosis, etc. Second, digestive system diseases, common are acute gastroenteritis, viral enteritis, bacterial enteritis, etc. Urinary system diseases, such as acute urinary tract infection, urinary stones or urinary tract tumors. Endocrine system diseases, such as precocious puberty, congenital hypothyroidism, congenital adrenal cortical hyperplasia, etc. V. Diseases of the nervous system, such as encephalitis and epilepsy, are common.