Children have fever and chills, in which the core cause of the chills is skeletal muscle tremors, which increase heat production and cause the body temperature to rise. Children with fever and chills may be caused by the contraction of skeletal muscles, which leads to an increase in body heat, because when a person has a fever, the hypothalamus sends a signal that the subcutaneous blood vessels of the body close to the skin will contract, resulting in the flow of blood to the core, and in order to replenish the heat, the skeletal muscles will begin to contract the muscles, which leads to shivering when the fever is present. Children with fever and chills may have other reasons, it is recommended to go to the hospital in time for relevant examinations, clear causes and then actively treat the symptoms, to avoid delaying the child’s condition.