To identify atypical Kawasaki disease accurately and early, let us first review the typical diagnostic criteria for Kawasaki disease. For the convenience of memory, the six major symptoms of the diagnostic criteria are listed in order from general to local and from head to toe as follows: (1) fever: more than 5 days; (2) rash: mainly on the trunk, maculopapular, erythema multiforme-like or scarlet-like; (3) bilateral conjunctival congestion without exudate; (4) chapped lips and poppy tongue; (5) swollen lymph nodes in the neck; (6) swollen and flaky finger and toe ends, etc. (5) swollen finger and toe ends, desquamation, etc. The diagnosis of typical Kawasaki disease can also be confirmed if more than 5 of the above criteria, including fever, are met, or if 4 of the above criteria are met, plus a dilated coronary artery or aneurysm is detected by cardiac ultrasound. The so-called atypical Kawasaki disease refers to patients with clinical suspicion but not enough to confirm the above criteria, especially in the early diagnosis, where the patient has fever for less than 5 days and also rarely has obvious enlarged lymph nodes in the neck, etc. Moreover, there are epidemiological data showing that the incidence of coronary artery dilatation or aneurysm is not higher than that of typical Kawasaki disease, and these characteristics make the clinical diagnosis of Kawasaki disease difficult, and for various reasons (such as intravenous These characteristics make the clinical diagnosis of Kawasaki disease difficult, while the proportion of such patients in the clinic is gradually increasing due to various reasons (such as early application of intravenous C globules, etc.). Based on clinical experience at home and abroad, the following indicators are currently considered as diagnostic references for atypical Kawasaki disease: (1) erythema at the site of BCG vaccination; (2) significant increase in platelet count; (3) significant increase in C-reactive protein and sedimentation; (4) ultrasound indicating dilated coronary arteries or increased arterial wall glow; (5) heart murmur; (6) hypoproteinemia, hyponatremia, and perianal desquamation, etc.