【定义】体温升高超逾日常波动范围,即为发热。感染是发热的最常见病因,但有几种非感染性疾患,亦可以发热为其主要临床表现。虽然绝大多数体温升高的病人,都感受到发热,但也有少数患者,他们的体温升高并非发热而是一种高温现象,如中暑综合征、某些代谢病以及干扰体温调节的药物影响等。发热最好是从下丘脑水平来理解,家用恒温器与下丘脑对体温的调节作用,实有同曲异工之妙。位于下丘脑前部的体温调节中枢,主要以其对产热和外周散热的平衡作用,把内部温度调节在37℃ [Definition] If the temperature rises beyond the daily fluctuation range, it is a fever. Infection is the most common cause of fever, but there are several non-infectious diseases and fever can be its main clinical manifestation. Although most patients with elevated body temperature experience fever, there are also a few patients whose elevated body temperature is not a fever but a high temperature phenomenon such as the syndrome of heat stroke, certain metabolic diseases, and the influence of drugs that interfere with body temperature regulation. Wait. Fever is best understood from the level of the hypothalamus, and home thermostats and the role of the hypothalamus in regulating body temperature actually have the same twist. The thermoregulatory center located in the anterior part of the hypothalamus is mainly used for the balance between thermogenesis and peripheral cooling to regulate the internal temperature at 37°C.