Diagnosis is made if fever of ≥ 5 days has occurred and 4 of the following 5 criteria are noted:

1. Bilateral nonexudative conjunctival injection

2. Changes in the lips, tongue, or oral mucosa (injection, drying, fissuring, red strawberry tongue)

3. Changes in the peripheral extremities (edema, erythema, desquamation)

4. Polymorphous truncal exanthem

5. Cervical lymphadenopathy (at least 1 node ≥ 1.5 cm in diameter)