Fever spots, also known as roseola rash or sixth disease, are a common viral infection in children. This rash is characterized by red, pink, or tan spots that appear on the body after a fever subsides. There are several synonyms for fever spots, including exanthem subitum, roseola infantum, and three-day fever. These terms all refer to the same viral infection that causes the distinctive rash. While fever spots are generally harmless and usually go away on their own within a week, it's important to monitor any symptoms and seek medical attention if your child's fever persists or if they develop other symptoms like vomiting or diarrhea.