The causes of low blood glucose in children include insufficient eating or excessive consumption, as well as suffering from insulinoma, digestive system diseases, glycogen accumulation disorder and other diseases. 1. Insufficient eating or excessive consumption: Insufficient energy intake to meet the energy demand for growth and development and daily activities can lead to low blood glucose; increased consumption such as strenuous exercise and severe diarrhea may also lead to low blood glucose. 2. Disease factors: patients with insulinoma will produce excessive insulin, thus lowering blood glucose; suffering from digestive system diseases, resulting in impaired digestion and absorption of sugar substances, low blood glucose; glycogen accumulation disease is a congenital enzyme defects caused by glycogen metabolism disorders, there can be obvious hypoglycemia symptoms, but also growth retardation, liver enlargement and other conditions. Children with low blood glucose are recommended to seek timely medical attention to clarify the cause of the disease and treat it as soon as possible.