To "break out in sweat" is an idiomatic expression that refers to the sudden and excessive production of sweat on the surface of one's skin, generally as a response to physical exertion, high temperatures, intense emotions, or certain physiological conditions.
The phrase "broke out in sweat" usually implies the onset of perspiration in a sudden or uncontrollable manner, often appearing in reference to someone experiencing a sudden increase in body temperature or encountering a stressful situation. Sweat is the body's natural response to regulate its temperature and cool down, and breaking out in sweat usually occurs when the body's cooling systems are activated.
When someone breaks out in sweat, their body's sweat glands release moisture through the skin, resulting in visible perspiration that can dampen clothes and may be accompanied by a feeling of heat or discomfort. The amount of sweat produced can vary from a light sheen to copious amounts depending on the individual and the circumstances.
This expression is commonly used to convey the intensity or suddenness of a physical or emotional reaction. For instance, a person might "break out in a cold sweat" when experiencing fear or anxiety. It is also frequently used to describe people engaged in vigorous physical activities, such as exercise or intense sports, who "break out in a sweat" as a result of their exertion.
Overall, breaking out in sweat refers to the rapid and often profuse release of sweat, predominantly in response to physical effort, elevated body temperature, or intense emotions.
