The etiology and pathogenesis of pediatric Kawasaki disease, or cutaneous mucosal lymph node syndrome, are not fully understood and are presumed to be related to the following factors: 1. Infectious factors, the etiology may be multiple, including certain bacteria, such as Staphylococcus, Streptococcus, Propionibacterium. Certain viruses, such as retroviruses, mycoplasma, rickettsia, etc. 2, non-infectious factors, such as organic mercury poisoning, contamination of washing solutions or chemical allergies, etc. 3, genetic susceptibility genes. It is believed that the above factors lead to acute immune regulation disorders in pediatric patients, triggering a series of immune-mediated systemic vasculitis lesions.