What is sweating and what does it mean to humans?

Sweating is the process of sweating through the sweat glands. Together with sweat, a person loses fluid and salt. Normal sweating is essential for the body to function properly. One of the main functions of perspiration is to control body temperature. If the body temperature rises, the person begins to feel hot. The sweat glands expand and the person loses fluid, along with it losing heat. Body temperature drops noticeably. It is for this reason that we sweat when a fever occurs during illness. If a person freezes, then the sweat glands, on the contrary, shrink the holes, preventing heat from leaving the body with sweat.