Fever 38.5 ℃ is not high fever, moderate fever. When the body is under the action of pyrogen or when the body temperature center is dysfunctional, the process of heat production and heat dissipation can not maintain a dynamic balance, and the body temperature rises above the normal range, which is called fever. Body temperature between 37.3 ℃ -38 ℃ for low fever, 38.1 ℃ -39 ℃ for moderate fever, 39.1 ℃ -41 ℃ for high fever, 41 ℃ or more for ultra-high fever, so fever 38.5 ℃ is not considered a high fever, for moderate fever. Fever is a common clinical symptom and can be caused by a variety of reasons, such as fever caused by bacteria, viruses, Mycoplasma pneumoniae, fungi, etc., or by malignant tumors, leukemia, heatstroke, extensive burns and other diseases. Therefore, after the appearance of fever, should actively go to the hospital fever clinic or general internal medicine department, to clarify the cause of the disease, symptomatic treatment. In addition to medication as prescribed by the doctor, physical cooling can also be used at the same time to lower the temperature, including drinking more water, applying antipyretic patches or warm water baths.