Repeated fever in 6-year-old children can be seen in respiratory diseases, digestive diseases, Kawasaki disease, etc., and need to be judged according to the specific situation of the child. 1. Respiratory system diseases: such as acute upper respiratory tract infections, which are more common in clinical practice, may cause recurrent fever, mostly caused by viral infections (such as rhinovirus, etc.), and some of them may be secondary to bacterial infections (such as hemolytic streptococcus, etc.), and in addition to the above mentioned symptoms, nasal congestion, running nose, or coughing and other symptoms can also occur. 2. Digestive system diseases: such as acute infectious diarrhea disease, children may have recurrent fever, accompanied by diarrhea and other symptoms, bacterial (e.g. salmonella, etc.) infections can be seen in the perfect stool routine examination of leukocytosis. 3. Kawasaki disease: also known as cutaneous mucocutaneous lymph node syndrome, the etiology of which is still unknown, the clinic can appear the above symptoms, which can be accompanied by chapped lips, rash or hard swelling of the hands and feet, etc., and some of the children can be seen in the cardiac coronary artery dilatation. 6-year-old children with recurring fever, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.