Babies with fever can sleep. After the baby has been treated with antipyretic drugs or physical cooling depending on the temperature, if the baby wants to sleep, you can let the baby sleep, and if the baby is sleeping smoothly, you don’t have to wake the baby deliberately. Because the fever will make all parts of the body function less, the appetite will also be reduced, and the body will also increase energy consumption, which will make the baby appear extremely tired and weak, so it will seem more sleepy than usual. However, it is recommended that parents remember to feed their babies some warm water before they go to sleep to promote their body metabolism and prevent dehydration and electrolyte disorders caused by fever.