Neonatal hypoglycemia is diagnosed as venous blood glucose below 2.2 mmol/L regardless of gestational and daytime age, and below 2.82.6 mmol/L is the cut-off value for clinical management. Neonatal hypoglycemia is a common disease in the neonatal period, often occurring in preterm infants, full-term small-like infants, infants of diabetic mothers, and is more common in neonatal hypoxic asphyxia, sclerosis, and infected sepsis. Persistent or repeated episodes of hypoglycemia can cause severe central nervous making brain cells energy metabolism disorder, brain cells swelling, softening, necrosis, and clinical neurological sequelae such as mental retardation and cerebral palsy. So how to prevent low blood sugar in newborns 1, early start milk: newborns can start milk 30 minutes after birth, it is recommended that breast milk is preferred. For newborn babies, under the principle of feeding on demand, if the baby has been sleeping, wake the baby up every 2-3 hours for timely feeding. Because babies tend to be drowsy when they are in a state of hypoglycemia, if you think the baby is asleep and delayed feeding, it is easy to cause hypoglycemia, which can have serious consequences. 2, high-risk baby family care is very important: for newborns at high risk of hypoglycemia, the baby should return to the hospital for follow-up after discharge according to medical advice; at home, we should pay careful attention to the baby’s state, reasonable interval breastfeeding, when the baby is found to be depressed, drowsy, refusing to breastfeed and other abnormal states, you need to seek medical attention.