Should you add sugar into your newborn water
No! Your newborn does not need water and they do not need sugar. Your newborn should only be getting breastmilk or formula. Anything else can cause an electrolyte imbalance or other problems in your baby. Once you bring your newborn home from the hospital only give them breastmilk or formula, nothing else.
Sometimes the hospital will give your baby sugar water but it is being used for medical reasons and your baby's blood sugar and fluid intake/output is being monitored.