Kawasaki disease is a disease with unclear etiology and unclear pathogenesis of the autoimmune system. Its main pathological change is systemic vasculitis, commonly occurring in the coronary arteries. At the onset, symptoms in the hands and feet include stiff swelling and erythema during the acute phase. In the recovery phase, membranous peeling occurs at the junction of the skin and the nail base of fingers and toes, and there are transverse grooves in the nails. In severe cases, the nails of the fingers and toes may also fall off. Additionally, its skin manifestations include polymorphic skin plaques and scarlet fever-like rashes, which commonly appear in the first week of the disease, with redness and peeling of the skin around the anus.