The eyes may be very sensitive to light. Measles can cause serious and sometimes permanent health problems. It often causes an ear infection or pneumonia. Encephalitis can lead to convulsions, deafness or mental retardation. One child in every 1,000 with measles may die of complications.
Mumps is a disease caused by a virus, usually occurring in childhood.
It causes fever, headache and inflammation of the salivary glands causing the cheeks to swell painfully. Sometimes mumps is more serious. This usually goes away without leaving permanent damage. Mumps can also cause deafness. About one out of every four men with mumps develops a painful inflammation and swelling of the testicles.