Baby fever is usually caused by viral infection, in the process of fever will be repeated 3-5 days, the treatment is mainly symptomatic treatment. If the baby’s temperature exceeds 38.5 ℃, poor mental state, you can give your baby a little fever medicine Merlin or ibuprofen, you can also eat Tylenol or use pediatric antipyretic suppository anal treatment. As long as the baby is in good spirits, it can be observed at home for 72 hours. If the baby has fever for more than 72 hours and still has repeated high fever or poor spirits when the body temperature is not high, or has other symptoms such as rash and cough while having fever, it is necessary to go to the hospital in time.