A baby with rubella usually recovers in about 7 to 10 days. This condition is mainly caused by rubella virus infection, and symptoms such as fever may occur during the rash. If the temperature exceeds 38.5 degrees Celsius, you should take ibuprofen, acetaminophen and other medications under doctor’s supervision. During the treatment, you need to pay attention to keep your baby warm and avoid getting wind and cold. If the situation is more serious, you can also cooperate with the doctor to take ribavirin and other antiviral drugs for treatment. Don’t scratch the rash area to avoid further infection. In addition, you can apply glycerine lotion to the affected area as prescribed by the doctor to reduce inflammation and relieve pain.