Fever people cold because of fever when the thermoregulatory center appears to produce too much heat, heat dissipation is reduced; and skin capillary contraction, the temperature is reduced, people feel cold. 1. Fever is due to bacteria and viruses releasing toxins in the body, stimulating the body temperature regulation center, causing excessive heat production and reduced heat dissipation, making people feel cold. 2. When fever occurs, through sympathetic nerve stimulation, the capillaries of the skin contract, blood flow decreases, and the temperature of the skin decreases; the skin dissipates less heat, and the body feels cold. When fever occurs, there will also be skeletal muscle contraction, causing generalized shivering and chills. Fever people cold, mostly in the early fever, this time to pay attention to warmth, when with the gradual increase in body temperature, the body appears a lot of sweating, heat dissipation increased, the cold disappears.