The fever process is usually divided into three periods, namely, the period of rising body temperature, the period of continuous body temperature, and the period of falling body temperature. 1. During the period of rising body temperature, the body produces more heat than it dissipates, so the patient’s body temperature will continue to increase, and there will also be chills, shivering, chills, pale skin, and no sweating. 2. The way the body temperature rises is sudden and gradual, and the way the body temperature rises differs according to the heat type. 2, The anaphylactic phase of body temperature, when the heat dissipation of the body increases and the heat production decreases, the patient will have a lot of sweating, the skin temperature decreases, the face turns from flushed to white, and the breathing gradually stabilizes.