Why do I sweat?

Why do I sweat?

Professor Gizmo (Amazing Science Presentations) gives expert video advice on: What is my body made of?; Why do we get "goose bumps"?; How do I catch colds? and more...

You sweat because you're warm, and this sweating is actually your body putting a layer of liquid on the surface of the skin. And that layer of liquid is then exposed to the air and it evaporates. Now evaporation is a cooling process. It actually needs the heat energy from our body to evaporate, so as it evaporates it's taking the heat from our body, and because it's taking the heat from our body, the evaporating water in our skin, or sweat, actually cools our body down so we're not so uncomfortable.