A four-year-old child’s fever can be caused by infections, such as respiratory tract infections, gastrointestinal infections. 1. Respiratory tract infection: four-year-old child fever recurrence is generally due to their own resistance to reduce bacteria invade the upper respiratory tract and cause infection, such as tonsil inflammation, usually accompanied by fever, chills, sore throat, cough and other symptoms. 2. Gastrointestinal infections: Dietary inattention to eat too cold or too spicy food and then the abdomen is cold, causing infection, resulting in fever. Usually accompanied by diarrhea, vomiting, dehydration and other symptoms. Four-year-old children with recurring fever may also have other causes, such as Kawasaki disease, urinary tract infections, etc., it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.