Kawasaki disease has no effect on IQ. Kawasaki disease is by far considered to be the most dangerous in terms of cardiovascular involvement, causing coronary artery lesions, and does not affect the development of intelligence, nor does it affect the development of the nervous system, and does not have an effect on IQ. The age of onset of Kawasaki disease is between 6 months and 2-3 years old, and this age of onset is also the age of onset of febrile convulsions, so if the child is not treated promptly with symptomatic antipyretic treatment, the child will develop febrile cramps. Of course, febrile cramps do not have a substantial effect on intelligence, but it is always important to avoid such situations. Kawasaki disease among the high fever must pay attention to the use of antipyretic drugs to achieve timely heat treatment and avoid high fever convulsions.