Babies with gastroenteritis can drink formula milk appropriately. If the baby is breastfed, it is recommended to stick to breastfeeding as much as possible; if there is no breast milk, formula feeding can be continued. This is because the protein and nutrients contained in formula milk or breast milk can help your baby recover, while the water contained in it can prevent your baby from showing symptoms of dehydration. In addition, if the baby is less than 6 months old, its entire nutrition comes from breast milk or formula because the gastrointestinal tract is not fully developed and cannot consume other foods, and it needs to continue to eat to prevent excessive hunger. At the time of gastroenteritis, it is important to pay attention to the amount of feeding, which can be done in small amounts and several times to reduce the gastrointestinal burden and avoid overfeeding to aggravate the symptoms of vomiting or diarrhea. In addition, if your baby is older than 6 months, you can let your baby eat some starchy foods, such as millet porridge, rice flour, etc. You can also choose pureed vegetables and fruits, which are easier to digest than milk powder and can reduce the burden on the gastrointestinal tract. If the gastroenteritis is longer and there is secondary lactose intolerance, etc., you can drink low lactose formula or lactose-free formula appropriately under the guidance of your doctor, which may slow down the symptoms of vomiting and diarrhea in your baby.