One and a half year old baby repeated fever 39 ℃ not runny nose may be caused by infection, you can go to the hospital to do a blood test, clear cause, targeted treatment, such as under the guidance of the doctor for anti-infection, antipyretic treatment. Repeated fever 39 ℃ without a runny nose in this case the body may be infected, you can do routine blood tests, if there is a clear bacterial infection, the need to use antibiotics for treatment, such as cefradine particles, need to pay attention to the side effects of the drug, such as nausea, diarrhea, skin rashes and other adverse reactions. Fever 39 ℃ also need to use antipyretic treatment, such as ibuprofen suspension, need to pay attention to the side effects of drugs, such as nausea, vomiting, dizziness and other adverse reactions. One and a half year old baby repeated fever 39 ℃ not runny nose, it is recommended to take the child to the hospital in a timely manner to do the relevant examination, to identify the cause and then targeted treatment.