Kawasaki disease is a rare childhood illness that affects the blood vessels and can cause heart problems. The disease is most common in children ages 1-2 years. It's not contagious. The symptoms -- which include high fever; red eyes; rash; red and swollen lips, tongue, feet and hands; and swollen lymph nodes -- can be severe for several days, but with early diagnosis and treatment most children fully recover with no long-term problems. Follow the links below to find WebMD's comprehensive coverage about what causes Kawasaki disease, what it looks like, how it's treated, and much more.