Imagine that you have a baby sister, and that she is three years old. She is in her bedroom playing baby dolls, and she comes back in your room. You see bruises all over her. You tell your mother but she can not explain the bruises and neither can you. Your mother should probably call your sister’s doctor who will be able to either explain the cause of the bruises or perhaps determine that your sister may have a genetic condition called Kawasaki Disease. The disease does not cause your sister any pain, so do not worry about that. It will only cause her to have multiple bruises. If not treated properly, she could have a heart attack later in her life.