The prognosis of Kawasaki disease depends on the involvement of coronary arteries. If there is no coronary artery disease, the patient can be treated as normal, if there is coronary artery disease, there is a risk of myocardial infarction after treatment. 1. Without coronary artery disease, when no cardiovascular abnormality is detected during the disease period and in the post-cure review, the patients will have no obvious clinical symptoms during the 10-20 years of follow-up after cure, and will be no different from normal people; 2. Coronary artery disease, usually detected during the disease and post-cure review of coronary artery abnormalities, including coronary artery dilatation, coronary artery aneurysm, etc., due to the slowing down of blood flow through the significantly dilated blood vessels, which may promote thrombosis, and myocardial infarction is very likely to occur, requiring regular assessment of cardiac function, including the absence of arrhythmia, heart failure, valvular insufficiency or myocarditis. In addition to the need for repeat cardiac ultrasound within 2 weeks after the cure of Kawasaki disease, patients should be closely monitored for recurrent fever, which needs to be taken seriously because fever suggests persistent inflammation and patients are more likely to develop coronary artery abnormalities. It is recommended that abnormalities be detected and early medical attention be sought to avoid delaying the disease.