The child has no cough, no runny nose, only fever.

Children appear this phenomenon, according to the first consideration is due to bacterial or viral infection, such as gastrointestinal cold, enteritis, etc. You need to take your child to the hospital in time for pediatric treatment, blood tests, follow the doctor's advice to use antibiotics or antiviral drugs active treatment. If the temperature is above 38.5 degrees, use antipyretic drugs active treatment.