what causes body chills
Chills are caused by rapid contraction and relaxation of the muscles to increase body temperature. A fever can help to kill infectious pathogens or prevent their spread because most pathogens that cause infection survive best at a normal body temperature.
Having chills refers to feeling excessively cold, even when you are wearing warm clothing or are wrapped in blankets. When you have the chills, you may also be shivering or look pale. Chills are often related to fever, an increase in body temperature above normal (98.6 degrees Fahrenheit). Fever is a sign of inflammation or infection in the body.
Chills and fever can be caused by fairly benign conditions, such as a cold, or by serious conditions, such as influenza, malaria or meningitis. Chills and fever are more common in children than adults because even minor illnesses produce a fever in children.