发热即是体温异常升高。小儿时期正常体温可波动于一定范围,短暂的体温波动,全身情况良好,又无自觉症状,可不考虑为病态。正常小儿腋下体温一般为36～37℃;春秋冬三季平均值上午36.6℃,下午36.7℃,夏季上午36.9℃,下午为37℃。喂奶或饭后、运动、哭闹、衣被过厚、室温过高均可使小儿体温暂时升高至37.5℃左右,甚至达38℃,尤其是新生儿及小婴儿,更易受上述条件影响;相反,若饥饿、低热量,尤其是体弱患儿处于少动 Fever is an abnormal increase in body temperature. Normal body temperature during infancy can fluctuate within a certain range, short body temperature fluctuations, the general condition is good, but no symptoms, can not be considered as pathological. Normal child axillary body temperature is generally 36 ~ 37 ℃; spring and autumn and the three seasons mean 36.6 ℃ in the morning, afternoon 36.7 ℃, 36.9 ℃ in summer and 37 ℃ in afternoon. Feeding or after meals, exercise, crying, clothing is too thick, high temperature can make children temporarily raised body temperature to about 37.5 ℃, or even up to 38 ℃, especially newborns and young babies, are more susceptible to the above conditions; Conversely, if hungry, low-calorie, especially infirm children are less active