Having muscle contraction and spasmodic shivering, cold shivering all over the body, this is chills. The shivering is due to the body’s efforts to resist the cold climate outside and maintain a normal body temperature by shivering to produce a large amount of heat, thus ensuring the normal physiological functions of the body. In general, the body is in urgent need of energy replenishment, the body muscles will twitch when shivering, this time the cells will produce energy to support muscle movement, and the energy produced in addition to part of the cell’s own activities, most in the form of heat energy dissipation, so people will shiver when cold. The fever and the shivering often appear in succession, so pay attention to the temperature measurement when the shivering, if there is a high fever, promptly go to the hospital to help determine what causes the shivering and high fever, such as infection, bacteremia, etc. can cause shivering and fever.