Kawasaki Disease in Children
Content reviewed against published AAP, CDC, NIH guidelines
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Kawasaki disease is an acute inflammatory condition that primarily affects children under 5. It causes inflammation of blood vessels (vasculitis) throughout the body, with particular danger to the coronary arteries of the heart. The cause is unknown but likely involves an abnormal immune response to an infectious trigger in genetically susceptible children. Early diagnosis and treatment with IVIG can prevent serious heart complications.
Key takeaways
- Kawasaki disease is an acute inflammatory condition that primarily affects children under 5.
- Duration: The acute febrile phase lasts 1-2 weeks. The subacute phase (peeling, joint pain, thrombocytosis) lasts 2-4 weeks. Full recovery takes 6-8 weeks for uncomplicated cases. Patients with coronary artery involvement require long-term cardiology follow-up.
- Go to ER if: Child with suspected Kawasaki disease (fever 5+ days with classic features)
- No vaccine currently available
Symptoms
How It Presents by Age
0-6 months
Incomplete (atypical) Kawasaki disease is more common at this age — fewer classic criteria may be present. Higher risk of coronary artery complications due to delayed diagnosis. Prolonged fever with irritability and incomplete features should raise suspicion.
Risk level: Very high — often diagnosed late, higher complication rate
6-12 months
May present with incomplete criteria. High fever, irritability, and rash are most common early signs. Red eyes without discharge is a key clue. Important to consider in any baby with prolonged unexplained fever.
Risk level: High
1-5 years
Peak age for Kawasaki disease. Classic complete presentation with fever plus 4 of 5 criteria is most common in this age group. Boys affected 1.5 times more than girls.
Risk level: Moderate to high (peak incidence)
5+ years
Less common but still occurs. May present with more atypical features. Older children and adolescents may have a higher risk of coronary complications due to diagnostic delay.
Risk level: Moderate
Treatment
IVIG (Intravenous Immunoglobulin)
Single high-dose infusion (2 g/kg) given over 10-12 hours. Most effective when given within the first 10 days of illness. Reduces risk of coronary artery aneurysms from 25% to less than 5%.
High-dose aspirin
Anti-inflammatory dose (80-100 mg/kg/day in 4 divided doses) during the acute febrile phase, then reduced to low-dose (3-5 mg/kg/day) for antiplatelet effect for 6-8 weeks or longer if coronary abnormalities are found.
Repeat IVIG or corticosteroids
For IVIG-resistant cases (persistent fever 36 hours after initial IVIG), a second dose of IVIG or IV methylprednisolone may be given.
Cardiac monitoring
Echocardiogram at diagnosis, 2 weeks, and 6-8 weeks after onset. More frequent monitoring if coronary abnormalities are detected.
Infliximab
Anti-TNF therapy may be considered for refractory cases not responding to IVIG and steroids.
Home Care
- Kawasaki disease requires hospital treatment — there are no home remedies for the acute phase
- After discharge, give low-dose aspirin as prescribed
- Keep follow-up cardiology appointments
- Keep the child comfortable with fluids and rest
- Moisturize peeling skin during the recovery phase
- Avoid live vaccines for 11 months after IVIG (discuss with pediatrician)
- Report any recurrence of fever promptly
When to Worry
Go to the ER if:
- Child with suspected Kawasaki disease (fever 5+ days with classic features)
- Signs of heart failure — rapid breathing, excessive sweating, inability to feed
- Child with known Kawasaki disease who develops chest pain
- Signs of shock — cold extremities, rapid heart rate, lethargy
- Severe abdominal pain mimicking surgical emergency
Call your doctor if:
- Fever lasting more than 5 days
- Red eyes with persistent fever
- Swollen, red lips or strawberry tongue with fever
- Rash with prolonged fever
- Swollen hands or feet with fever
- Child with prior Kawasaki disease who develops new fever or chest symptoms
Keep an eye on:
- Fever lasting 5+ days with any of the classic signs (red eyes, rash, lip changes)
- Prolonged fever in a child under 1 year with even 2-3 features
- Extreme irritability with persistent fever
- Peeling of fingers or toes after a febrile illness
- Chest pain or shortness of breath in a child with history of Kawasaki disease
Prevention
- There is no known way to prevent Kawasaki disease
- Early recognition and treatment (within 10 days of fever onset) prevents coronary complications
- Be aware of the symptoms, especially in children under 5
- Seek medical attention for any fever lasting more than 5 days in a young child
- Children of Asian descent have higher incidence — maintain heightened awareness
Contagion & Incubation
Incubation
Not applicable — Kawasaki disease is not an infectious illness in the traditional sense. The acute phase typically lasts 1-2 weeks without treatment.
Contagious for
Not contagious.
Duration
The acute febrile phase lasts 1-2 weeks. The subacute phase (peeling, joint pain, thrombocytosis) lasts 2-4 weeks. Full recovery takes 6-8 weeks for uncomplicated cases. Patients with coronary artery involvement require long-term cardiology follow-up.
Frequently asked questions
How long does kawasaki disease in children last?
How does kawasaki disease (mucocutaneous lymph node syndrome) spread?
When should I take my baby to the ER?
Can kawasaki disease (mucocutaneous lymph node syndrome) be prevented?
When can my child return to daycare?
Sources
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources
Related Illnesses
Bottom line
Kawasaki Disease in Children is treatable with appropriate medical care. Seek emergency care if child with suspected kawasaki disease (fever 5+ days with classic features).
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.