The baby has a fever of 37.8℃, which is a low fever, it is not recommended to use antipyretic drugs, you can take physical cooling methods to control the body temperature in a certain range, such as using a towel dipped in warm water to wipe the forehead, neck, front and back of the ears, etc.; you can also use cooling paste on the forehead and the back of the neck and other parts of the large vertebrae point, so that the body temperature returns to normal as soon as possible, while preventing the body temperature from rising further; you can give the baby appropriate drinking warm water to promote Do not put too many clothes on the baby to avoid heat dissipation, but also should not wear too little clothes to avoid getting cold, and increase or decrease clothes according to the baby’s needs; try not to take the baby to places with many people to prevent getting cold or cross-infection. If your baby is in a poor state of mind and does not want to eat, do not force him/her to eat and try to give light and easily digestible food; if your baby has cough, phlegm and diarrhea at the same time, consider it to be caused by cold, upper respiratory tract infection or digestive system infection and need to receive anti-infection treatment; if your baby has fever for a long time or the temperature continues to rise and reaches 40℃ or more, you need to seek medical attention in time to avoid delaying the condition.