The body temperature of a newborn baby is 36.9°C, which is within the normal range. The normal newborn’s body temperature fluctuates between 36°C and 37.5°C, and all within this range are normal. Under normal circumstances, the body temperature is high in the afternoon, after feeding, and when crying, but all fluctuate within the normal range. If the child’s body temperature temporarily exceeds 37.5℃, the child’s body temperature can quickly return to normal by means of reducing clothing and lowering the environmental temperature, which is not considered a fever and does not require treatment. If the child’s body temperature continues to exceed 37.5℃, and the child’s body temperature continues not to drop through the above means of cooling, this situation exists fever. The newborn’s resistance is relatively weak, and when there is a fever, it is considered to be caused by infection, and routine blood tests need to be completed. If there are elevated white blood cells, this situation requires symptomatic anti-infection treatment.