Kawasaki disease is an autoimmune vasculitis, primarily concerning because it affects the coronary arteries of the heart. Without effective treatment, some cases can lead to coronary artery dilation and even the formation of coronary artery aneurysms. Therefore, hospitalization is generally recommended during the acute phase of Kawasaki disease. During hospitalization, treatment typically involves the use of intravenous immunoglobulin and aspirin. After treatment with intravenous immunoglobulin, the body temperature generally begins to decrease gradually. Once the body temperature has stabilized for about three days and there are no complications, the patient can usually be discharged, so most hospital stays last about 5-7 days. (Medication should be taken under the guidance of a doctor.)