Coronary artery dilatation occurs locally or diffusely, more than twice the original local diameter, presenting single or multiple tumor-like changes, which is called coronary artery aneurysm. The clinical manifestations are varied and non-specific. This mainly depends on the pathological changes of the aneurysm itself and whether there are complications. Its clinical manifestations may be symptoms and signs of angina pectoris or acute myocardial infarction. Heart failure may also occur if the fistula is large. Patients with Kawasaki disease may be accompanied by persistent high fever, generally lasting more than 5 days, pharyngitis, peeling of hands and feet, multiple erythema and cervical lymphadenopathy, bilateral conjunctivitis, etc.