Measles, also known as rubeola, is a respiratory disease characterized by a rash all over the body in addition to fever, runny nose, and cough. It is typically a childhood illness that can be complicated by ear infection or pneumonia; associated symptoms for these conditions can include ear pain or fullness, shortness of breath, and chest pain. Other symptoms common in measles include reddened eyes, sore throat, sensitivity to light, and spots on the lining of the mouth known as Koplik's spots. Koplik's spots look like white grains surrounded by a red rim and usually appear at the back of the mouth. Symptoms and signs of measles usually appear one to two weeks after contracting the infection.