Baby measuring temperature 39 ℃ but forehead is not hot, may be due to inaccurate thermometer, forehead heat dissipation or due to cold sweating temperature lowering and other reasons, the common causes and treatments are as follows: 1, thermometer inaccuracy: if the measurement of body temperature 39 ℃ but forehead is not hot, you can choose to change a thermometer for measurement. Should try to avoid in the baby crying, strenuous activities, measurement time should be in 3-5 minutes, to ensure the accuracy of the measurement; 2, forehead heat: due to the body is wrapped in clothing, can not be dissipated, but the forehead is exposed to the air, by the influence of the external temperature, can be dissipated. Therefore, the forehead does not feel hot is a normal phenomenon, need to use ibuprofen and other drugs under the guidance of the doctor to reduce fever; 3, fever and cold sweat: some babies will have cold sweat, chills and other symptoms of high fever, resulting in the forehead feels cold. You can stick a fever patch for physical antipyretic, at the same time to drink more warm water, relieve the symptoms of cold sweats, high fever can follow the doctor’s advice to take acetaminophen antipyretic, persistent high fever to seek medical attention. The baby body 39 degrees forehead is not hot, this situation, first of all, parents should let the room to keep ventilation, room temperature should not be too high, otherwise it is not conducive to the child’s heat dissipation. And the use of warm water to wipe the limbs, unclothing on the baby and other physical cooling methods to try to control the body temperature, if the baby for a long time persistent high fever does not go down, the need to promptly consult a doctor for a comprehensive examination, to avoid more serious consequences.