Kawasaki disease is mainly due to some complications of the heart caused by possible damage to the coronary arteries.1. For example, it leads to excessive enlargement of the coronary arteries, which may further cause aneurysms; 2. It may lead to narrowing of the coronary arteries, and the risk of forming blood clots will be greatly increased; 3. Babies whose coronary arteries have been damaged have a higher chance of having a heart attack than ordinary people, even after the disease is cured; 4. disease babies are prone to arrhythmia and myocarditis, which may cause mitral regurgitation and vasculitis.