Hypoglycemia in children may be caused by preterm birth, malnutrition, excessive sugar consumption, and disease. 1. Premature babies: For example, premature babies or babies with very low weight will have hypoglycemia after birth due to insufficient energy reserve, and need to be rescued with calcium gluconate. 2. Malnutrition: Hypoglycemia in children is related to malnutrition, which can be easily caused by long-term picky eating, partiality or single diet, parents are advised to pay attention to the balanced diet of children in three meals a day. 3. Excessive sugar consumption: strenuous exercise, serious infections, diarrhea and other conditions are likely to increase the body’s sugar consumption, excessive sugar consumption is likely to cause hypoglycemia symptoms in children, when hypoglycemia is temporary. 4. Disease: Hypoglycemia in children is related to diseases, including immune diseases, islet cell tumor, overuse of insulin and hypoglycemic drugs. Parents find children with hypoglycemia, need to let the child eat something to supplement blood sugar in time, and take the child to the regular hospital for medical treatment.