The clinical manifestations of Kawasaki disease include fever lasting more than five days, ineffective antibiotic treatment, rashes, transient swelling of the cervical lymph nodes, conjunctival congestion, strawberry tongue, cracked lips, hard swelling of fingers and toes, and desquamation around the nails and anal region during the recovery phase.

Allergic purpura is mainly manifested by rashes, which are generally hemorrhagic rashes below the buttocks, symmetrical on the lower limbs, raised above the skin surface, and usually without fever. Besides rashes, allergic purpura can also involve joint pain, abdominal pain, or allergic purpuric nephritis among other conditions.