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Diagnosis

There's no single test to diagnose Kawasaki disease, but there are some key signs that suggest a child may have this condition.

The National Institute for Health and Care Excellence (NICE) states that your child may have Kawasaki disease if they have:

These symptoms include:

The skin on your child's fingers or toes may become red or hard, and their hands and feet may swell up.

Your child's hands and feet may also be tender and painful to touch or put weight on, so they may be reluctant to walk or crawl.

Read more about the symptoms of Kawasaki disease.

In some cases, Kawasaki disease may be diagnosed even if a child doesn't have 4 or more of the key symptoms listed above, or even if the fever has only lasted 4 days.

Tests

Your child may need to have tests to rule out other conditions that could be causing their symptoms.

Possible conditions your child could have include:

Several tests can also be carried out to help support a diagnosis of Kawasaki disease.

These include:

Individually, these tests may not be conclusive, but when combined with some of the key symptoms listed above, they can help confirm a diagnosis.

Heart problems

Complications of Kawasaki disease usually affect the heart. This means your child may need some tests to check their heart is functioning normally.

These must include:

During the acute phase of Kawasaki disease (weeks 1 to 2), several heart abnormalities may be identified.

These could include:

Read more about the complications of Kawasaki disease.