High fever of 39 ℃ took ibuprofen still does not go down can be combined with physical cooling, if the temperature is not down trend need to go to the hospital immediately. 1.joint physical cooling: can use warm water to wipe the body or will be placed on the forehead, armpits, thighs and other ice packs (need to use a towel wrapped in ice packs or change the position, to avoid a longer period of time caused by frostbite), at the same time need to drink more water. 2. Hospital: If the high fever of 39 ℃ ate ibuprofen and combined with physical cooling, the body temperature is still not downward trend, should go to the hospital in a timely manner, if there is a bacterial infection, the need to actively use amoxicillin, cephalosporin and other drugs to fight infection treatment. High fever of 39 ℃ after self-treatment, regardless of whether the body temperature drops, are recommended to go to the hospital in a timely manner, in order to clarify the diagnosis, timely treatment, to avoid delays in the condition.