The cause of Kawasaki disease in young children is not clear, but most children have an infection prior to the onset of the disease, so it is considered that Kawasaki disease is associated with a viral infection or other pathogenic infection, which triggers an abnormal immune mechanism in the body and induces a systemic vasculitis with a range of symptoms. Kawasaki disease in young children can involve the mucous membranes of the skin, swollen lymph nodes, and, in the most severe cases, the heart. Most children with Kawasaki disease can be treated with immunoglobulins and aspirin, but a few may have life-threatening symptoms.