The main causes of fever in newborns include the following: first, the infection factor, which is the most common. If the child is infected with viruses, bacteria, mycoplasma and other pathogens, most of them will have fever with other accompanying symptoms. If the child has a respiratory tract infection, he or she often has a stuffy nose, cough, runny nose, etc. If it is a gastrointestinal infection, it is often accompanied by abdominal pain, diarrhea, vomiting, etc., and should be treated promptly with anti-infective treatment. The second is due to excessive clothing, in addition to fever, will often sweat more, to reduce the amount of clothing for the child can be. The next is due to food accumulation fever, most of the diet is more, the tongue is thick and greasy, you can eat probiotics to regulate.