Why do people sweat when the weather is hot?

Due to the high temperature in summer, the body temperature inside and outside the human body is too high, and the organs are prone to edema and life-threatening. Therefore, in summer, the human body will secrete a lot of body fluids to keep the body temperature normal. And some people sweat more and sweat less for many reasons. Like obesity. Body fat is like a sponge used to keep warm, which has a strong insulation effect. And the human body will also generate a lot of heat because of exercise.