Kawasaki Disease: The Childhood Illness That Can Affect the Heart

What Is Kawasaki Disease?

Kawasaki Disease is a rare illness that mostly affects young children. It causes swelling in blood vessels throughout the body. Because of this, it is sometimes called a childhood heart illness. Many parents worry about heart complications in Kawasaki Disease, as the illness can harm the heart if not treated. According to the Centers for Disease Control and Prevention (CDC), most cases occur in children under five years old. However, older children can get it too. Early treatment helps lower the risk of serious problems.

Common Symptoms of Kawasaki Disease

At first, Kawasaki Disease symptoms can look like other common childhood illnesses. Still, some signs set it apart. For example, symptoms often appear in stages. The most common signs include:

High fever lasting more than five days

Red eyes without discharge

Red, cracked lips and a swollen, red tongue (sometimes called “strawberry tongue”)

Swelling and redness in the hands and feet

Rash on the body

Swollen lymph nodes in the neck

Not every child will have all these symptoms. Sometimes, symptoms may appear slowly. If you notice these signs, especially a long-lasting fever, you should contact a doctor right away.

Causes and Risk Factors

Doctors do not know the exact cause of Kawasaki Disease. However, experts think it may be linked to the immune system reacting to an infection. The illness is not contagious, so it does not spread from child to child. Some risk factors include:

Age: Most cases happen in children under five

Ethnicity: Children of Asian or Pacific Island background have a higher risk

Gender: Boys are slightly more likely to get Kawasaki Disease than girls

Even though these factors increase risk, any child can develop the illness. The World Health Organization (WHO) notes that early diagnosis is key to better outcomes.

How Kawasaki Disease Is Diagnosed

Doctors use several steps to diagnose Kawasaki Disease in children. First, they check for key symptoms, such as a long-lasting fever and rash. Next, they may order blood tests to look for signs of swelling in the body. Sometimes, doctors use heart tests like an echocardiogram. This test uses sound waves to create pictures of the heart. It helps doctors see if the heart or blood vessels are affected. Since no single test can confirm Kawasaki Disease, doctors rely on a mix of symptoms and test results.

Treatment Options for Kawasaki Disease

Early treatment is very important. It lowers the risk of heart complications in Kawasaki Disease. Most children receive treatment in a hospital. The main treatments are:

High-dose intravenous immunoglobulin (IVIG): This is a special blood product that helps reduce swelling

Aspirin: Doctors use this medicine to lower fever and reduce swelling

Sometimes, children may need other medicines if they do not respond to the first treatments. According to the American Heart Association, most children recover well with early care.

Possible Heart Complications

Although most children recover, some may develop heart problems. For example, Kawasaki Disease can cause swelling in the blood vessels that supply the heart, called coronary arteries. This can lead to:

Weakening or bulging of the artery wall (aneurysm)

Heart muscle swelling (myocarditis)

Problems with heart valves

Regular follow-up visits and heart tests help doctors watch for these issues. The CDC reports that with proper treatment, less than 5% of children develop serious heart problems.

Prevention and Lifestyle Tips for Families

Currently, there is no known way to prevent Kawasaki Disease. However, families can take steps to support their child’s health. For instance, early medical care is key if symptoms appear. After treatment, children may need regular heart check-ups. To help your child recover and stay healthy:

Follow all doctor instructions for medicine and follow-up visits

Encourage rest and healthy eating

Watch for any new symptoms, such as chest pain or shortness of breath

Ask your doctor about vaccines, as some may need to be delayed after IVIG treatment

With support and proper care, most children with Kawasaki Disease go on to live healthy lives.