There are many patients with fever who show chills before and during the fever, and chills can also occur, which are caused by the normal reaction of the body. The body temperature needs to be monitored and controlled within the normal range. If the body temperature exceeds 38.5℃, medication should be given to lower the temperature, combined with physical cooling and drinking more water. The cause of the fever needs to be clarified. Clinically, most of the causes of fever are infections, so controlling infections is a very important point in treating fever. Currently more and more unknown fever is particularly common in the clinic, so if the fever persists for more than 3 days and the symptoms do not improve significantly it is recommended to visit the hospital in time.