Infusion of fluids in small children will generally not cause a significant increase in blood glucose as long as the infusion is not glucose, if the infusion of glucose can cause a transient increase in blood glucose, which will recover on its own. If the infusion does not contain glucose, generally will not cause significant changes in blood sugar. If the infusion fluid contains glucose, it can cause blood glucose to rise. Normal people have a good ability to regulate blood glucose, so the blood glucose rise caused by the infusion fluid will disappear soon on its own and will not last long. If the blood glucose is persistently high (e.g., random blood glucose >11.1 mmol/L), prompt medical attention is needed. In conclusion, infusion will not have a lasting effect on blood glucose in children. If the blood glucose is persistently high, it is considered to be caused by diabetes mellitus, and prompt medical treatment is needed for relevant tests and diagnosis.