Chills have many possible causes, including health conditions, being in a cold environment ... That's when you have hot flashes and night sweats. Your brain resets your body temperature by ...

However, causes of chills without a fever include intense exercise, low blood sugar, medications, exposure to cold temperatures ... if you do not yet feel hot or feverish. In that case, other ...

This happens when a virus or bacteria acts on the part of the brain that regulates body temperature, called the hypothalamus.