The etiology of Kawasaki disease is currently unclear; its primary pathological feature is systemic vascular inflammation. Kawasaki disease typically presents with fever, high fevers ranging from 39 to 40 degrees Celsius. If a patient with Kawasaki disease has a lower temperature, it may indicate that the condition is quite severe. For example, children generally have weaker immune systems, or if they have a severe co-infection, hypothermia may occur. In this case, it is recommended that doctors perform further examinations and intensify treatment. Therefore, a lower temperature in Kawasaki disease is also abnormal. Normally, the body temperature should gradually return to the normal range, and both hypothermia and hyperthermia are definitely abnormal conditions.