Shivering in the cold is a natural response of the body to help maintain its core temperature. When someone is exposed to low temperatures, their body works to generate heat to prevent hypothermia (a dangerously low body temperature). Here’s how it works:

How it happens
When your body cools down, sensors in your skin send a signal to the brain, prompting your muscles to rapidly contract and relax. This motion generates heat, helping to warm you up.

Why it happens
Shivering is your body’s natural mechanism to produce heat and maintain warmth. It is also a common response to fever or infection and can serve as an important indicator of underlying health conditions.