Its lethargy, cough, and fever are worse than a cold. Plus, measles can also cause brain swelling, blindness, and death.

They can eventually combine to appear as one rash. Koplik spots are disease-specific and appear as yellow raised spot and bluish-white specks, usually in the inside of the mouth or cheeks.

Koplik spots, tiny white spots that may appear inside the mouth two to three days after symptoms begin.