The occurrence of fever and chills is often due to the infection of the human body with viruses or bacteria, and these microorganisms release a lot of toxins in the human body, which stimulate the thermoregulatory center of the brain and cause abnormal changes in the thermoregulatory center. When the change occurs the heat dissipation from the body surface will decrease and the heat generated will increase, there is microvascular constriction of the skin, the blood flow to the skin decreases, there is no sweating, the temperature of the skin decreases, so it feels colder, and the body temperature tends to rise dramatically at this time. It is recommended to use antipyretic treatment, you can take oral ibuprofen suspension or acetaminophen suspension to reduce the fever, the fever will gradually disappear after the feeling of cold. If you are an adult, you can also use indomethacin suppositories into the anus to dissipate heat, the effect is also good. The body surface of the bath to cool down the effect is also good, that is, the method of physical cooling.