Recurrence of Kawasaki disease in children is the same as the initial symptoms, which are mainly characterized by fever, hard swelling of the hands and feet, rash, swollen lymph nodes and conjunctival congestion. Recurrence of Kawasaki disease in children usually occurs within 12 months after recovery from the first episode of the disease, often due to irregular or incomplete treatment, and is most common in children under the age of three, with a lower chance of recurrence. When Kawasaki disease relapses, patients tend to have a fever, and most of them are high and last for more than five days, treatment with antibiotics is ineffective, the conjunctiva appears to be congested, the mouth and lips are flushed, the tongue appears to be poplar tongue, the hands and feet are hard and swollen, and the skin appears to have polymorphic congestive erythema, which most often occurs in the areas such as fingers and toes. For suspected recurrence of Kawasaki disease in children, it is recommended to consult the pediatric department of a regular hospital.