When an 8-month-old baby develops a sudden fever in the middle of the night, the first thing to do is to take the child’s temperature. If the fever is relatively high, above 38.5 degrees, it is best to give the child fever-reducing medicine for treatment. If you have ibuprofen suspension at home, it is more effective to give your child ibuprofen suspension to reduce fever. If there is no medicine at home, you need to give your child a physical cooling method to see if you can reduce the child’s temperature to below 38.5 degrees. You can use a warm towel to wipe the child’s whole body skin, especially the armpits, groin and neck, which are rich in large blood vessels, and wipe for a slightly longer period of time to help reduce the fever. In addition, if the temperature does not come down, you need to take the child to the hospital immediately, because the child is relatively small, under the stimulation of high fever is easy to occur febrile convulsions, which can produce some irreversible damage to the child’s brain function. If the temperature of the fever is not particularly high, below 38.5 degrees, take the child’s temperature more often so that it does not rise, and just give the child more water to drink.