It is one of the main causes of acquired heart disease in children, but it is treatable if identified early. Be aware of the symptoms: high fever, daily, difficult to give in to antipyretics, for more than 5 days, rash between the chest and legs and in the genital and groin area, redness and swelling of the back of the hands and soles of the feet, red eyes without exudate, cervical lymph node in the neck, larger than 1.5 cm, inflammation of the mouth and lips and red tongue similar to a strawberry.