Background: Mucocutaneous lymph node syndrome and infantile polyarthritis nodes are other names for Kawasaki illness, which is characterized by inflammation of the walls of various blood vessels in the body. It is particularly common among children and adolescents. Case presentation: A 6-year-old male child was brought by his parent to the pediatric unit after suffering from high-grade intermittent fevers of up to 102°F for three days, mild dehydration, tachycardia, rhinorrhea, cough, oropharyngeal changes, and oral thrush. He has a history of the previous hospitalization for a mild case of rectal prolapse which was pushed into place manually. On physical examination, he was agitated, febrile, and had a body temperature of 102°F. He also had mild swelling in the lymph node, no pallor but some dehydration, tachycardia (130 bpm), a respiratory rate of 35 breaths per minute, redness of the tongue, redness of the sole, a skin rash, and edematous lips. Later he was treated with antiplatelets, antibiotics, and intravenous fluids. Conclusion: Kawasaki disease (KD), an unusual kind of systemic inflammation, is most frequently found in children below the age of five. Due to the maternal antibodies' protective qualities, Kawasaki disease is rarely diagnosed in infants under the age of four months. There are ten to twenty occurrences per 100,000 children under five. The most well-known cause of acquired cardiovascular disease in newborns and young children is Kawasaki disease. If recognized and treated promptly, kids feel better in a few days and have a low risk of developing long-term heart issues.