Kawasaki disease, called mucocutaneous lymph node syndrome, generally has a good prognosis if there are no serious complications, and patients have the same life expectancy as normal people, with the average life expectancy possibly reaching about 70 years. Mucocutaneous lymph node syndrome is a kind of acute fever and rash pediatric disease that appears systemic vascular inflammation as the main symptom, preferably in infants and young children, the clinical manifestations include fever, rash, lymph node swelling, etc., most of the active treatment of this disease has a better prognosis, without serious complications, children with Kawasaki disease have the same life expectancy as the normal population, and the average life expectancy may reach about 70 years old. A few have serious complications such as severe cardiovascular lesions, coronary artery aneurysms, ischemic heart disease and other symptoms, the patient’s life expectancy may be affected, and even sudden cardiac death may occur, which is life-threatening. When Kawasaki disease is present, it is necessary to actively seek medical attention and follow the doctor’s instructions for rational treatment.