Fever in babies may be caused by upper respiratory tract infection, gastroenteritis, etc. If your baby is older than 6 months of age, you can drink a small amount of sugar water, if younger than 6 months of age sugar water is not recommended, you can increase the amount of breastfeeding or formula feeding. Babies with fever need to increase water intake to avoid dehydration due to water loss, but sugar water or fruit juice contains a lot of sugar. Consumption by infants who are too young may result in excessive sugar intake, which may easily affect the baby’s sense of taste and lead to refusal of breastmilk, formula or other normal food. Therefore, sugar water is not recommended for babies younger than 6 months of age. Normal formulated formula and breastmilk contain a lot of water, which can serve the purpose of preventing dehydration. If older than 6 months of age, sugar water can be consumed in small amounts, but it should not be too concentrated or it may also lead to taste preference. When your baby has a fever, in addition to increased hydration, you need to reduce clothing, pay attention to ventilation, and use antipyretics such as ibuprofen or seek medical attention if necessary.