Baby fever 39.5 ° C overnight, if you take timely and effective fever reduction methods and no other complications, usually does not affect the baby’s brain and the baby’s physical health; but if neither effective fever reduction methods, or the baby appeared to have serious complications such as convulsions, the baby’s central nervous system may cause some damage. 1. Will not cause serious consequences: baby fever 39.5 ° C is a high fever, at this time the need to take emergency fever, can be taken by oral ibuprofen, acetaminophen with physical cooling methods to reduce fever, the body temperature gradually return to normal and without any complications, will not cause serious consequences. 2. can cause serious consequences: children with high fever if you do not take timely fever, persistent high fever can cause febrile convulsions (due to high fever caused by convulsions convulsions), convulsions and even induced epilepsy and other serious complications. Babies with high fever need to go to the hospital, clear the cause of the targeted treatment, they can not randomly use drugs.