Kawasaki disease is prone to recurrence under the age of 3. The recurrence factor is a result of the cardiac sequelae left from the last infection. If there is no recurrence over the age of 8, then recurrence is very unlikely. It is a self-limiting disease with a 1% to 2% chance of recurrence. Without effective treatment, the incidence of coronary aneurysm is about 15% to 20%, but most aneurysms disappear within 1-2 years. However, most aneurysms can disappear within 1-2 years. Even if the disease is stable, it is necessary to follow up with the doctor to check the laboratory indexes and stop the medication slowly according to the condition to prevent recurrence.