Kawasaki disease is a condition that causes inflammation (swelling) of the walls of small to medium-sized blood vessels throughout the body. It most often affects the coronary arteries, which supply oxygen-rich blood to the heart. The disease usually occurs in children and can affect the heart if not treated promptly. Because it often involves the skin, mouth, and lymph nodes, it is also called mucocutaneous lymph node syndrome.
Kawasaki disease symptoms can include
Kawasaki disease is a condition that causes inflammation of blood vessels in children, especially affecting the heart arteries. The exact cause is not fully known, but several factors may trigger it.
There’s no single test for Kawasaki disease, but doctors use tests to support the diagnosis and rule out other conditions.
Risk factors for Kawasaki disease include:
Age: Kawasaki disease is most common in children under 5 years. Young children’s immune systems may react more strongly to triggers, making them more susceptible to the disease.
Gender: Boys are slightly more likely to develop Kawasaki disease than girls, although it can affect both sexes.
Ethnicity: Children of Asian descent, especially Japanese and Korean, have a higher risk, suggesting a genetic predisposition.
Family history: Children with a family history of Kawasaki disease are more likely to develop it themselves, indicating a hereditary component.
Seasonal pattern: Cases tend to occur more frequently in winter and early spring, possibly due to seasonal infections or environmental triggers.
Treatment for Kawasaki disease includes:
Intravenous Immunoglobulin (IVIG): A high‑dose antibody treatment given through a vein that helps reduce inflammation in the blood vessels and lowers the risk of heart complications. Most children start improving soon after receiving it.
Aspirin: Used initially in high doses to reduce fever, pain, and inflammation, then lowered to a long-term low dose to prevent blood clots. It is used safely under medical supervision in Kawasaki disease despite general caution in children.
After Initial Treatment: Most children show improvement shortly after receiving a single dose of IVIG (intravenous immunoglobulin), which helps reduce inflammation and lower the risk of heart complications. Following the acute phase, children are usually prescribed low-dose aspirin for at least six weeks to prevent blood clots. If there are coronary artery abnormalities, aspirin therapy may be extended, and additional monitoring may be required.
Without Treatment: If Kawasaki disease is left untreated, the illness typically lasts around 12 days, but inflammation of the blood vessels can lead to lasting heart problems, including coronary artery complications, which may require ongoing care and monitoring.
Monitoring Heart Health: Children may need follow-up tests 6–8 weeks after illness, and again at 6 months if needed. Persistent or serious heart issues are managed by a pediatric cardiologist, with treatment depending on the type of heart problem.