The diagnosis of common pediatric diseases includes: 1. history taking, including general content, complaints, current medical history, personal history, past history, family history, allergy history, due to the special nature of pediatrics, infants and children can not express their own symptoms, it is necessary to ask the family of the child’s symptoms, duration, progress of the disease and what relevant tests have been completed, as well as the general situation of the onset of the child, the process of medication and treatment effects. The order of examination can be flexible according to the child’s condition, including blood pressure measurement, skin lymph node detection, and examination of the head, neck, chest and abdomen, extremities, perineum, anus, and nervous system. 3. Treatment plan selection, including dietary treatment, such as general diet, special diet, enteral nutrition, parenteral nutrition, and medication, including antibiotics, glucocorticoids, and antipyretics. The common methods of administration include oral, injection and topical application.