39 degrees Celsius fever overnight generally will not burn, but should actively take physical cooling or medication to lower the temperature. Usually body temperature of 39 degrees Celsius indicates that the body is in a high fever state, but high fever lasts overnight is generally not burned out, but sustained high fever state is easy to the function of various organs and health caused by certain effects. Usually the body temperature of 39 degrees Celsius is easy to appear dizziness, blurred consciousness, limb convulsions and other symptoms, in order to alleviate the uncomfortable symptoms, to promote the return of the body temperature to normal, should be taken in a timely manner to deal with the measures. People with a body temperature of 39 degrees Celsius can first take physical cooling, such as placing ice packs on the head, warm water or alcohol baths. For the physical cooling effect is not satisfactory, if necessary, can be used ibuprofen, acetaminophen and other non-steroidal anti-inflammatory drugs to achieve the purpose of fever reduction. During the period of high fever, attention should be paid to drinking more water to replenish the body’s loss of water and prevent water electrolyte disorders. It is recommended to deal with high fever phenomenon in time, if necessary, follow the doctor’s instructions to use drugs, not to use drugs indiscriminately. Daily attention to appropriate exercise, balanced diet, help to improve immunity and resistance to disease.