What is the origin of the idiom "cold sweat" and when to use it?

The origin of the idiom "cold sweat" is derived from the physical reaction of the human body when experiencing intense fear, anxiety, or extreme stress. It has been used figuratively to describe this physiological response since at least the 18th century. This phrase is used to describe a physical reaction to intense fear, anxiety, or stress. It is commonly employed in various contexts and occasions where there is an emphasis on the overwhelming emotional response of an individual.