Why we sweat?

Why do Humans Sweat?

Sweat is your body’s natural way of cooling down. As the sweat comes out of your body, you cool off!

How does sweat cool?

Try this out. Put a small drop of water on the back of your hand. Then place your mouth close to your hand and blow hard. That spot will gradually feel cool. This is because the water begins to evaporate with your blowing and produces a cooling sensation. 

The inbuilt cooling system of the body uses the skin and blood for its functioning. The blood warms up as it passes through muscles and tissue. It carries the extra heat to the surface of the skin, which triggers the sweat glands in the skin to produce sweat - a combination of water (usually about 99 per cent) with small amounts of salts and amino acids dissolved in it. 

The sweat escapes through tiny pores on the skin, evaporating as it reaches the surface. As the sweat evaporates, it cools the skin beneath. In fact, a pearl-sized bead of sweat can cool nearly one litre of blood by 1.8 degree Centigrade (one degree Fahrenheit).

Why do we sweat more in summer?

Have you ever wondered why you sweat more on hot summer afternoons? Actually, the human body sweats all the time, even when we are sleeping. 

But when we exercise or perform some strenuous work we sweat more as the body gets heated up faster. As a result, we sweat more during summers and less during winters. The rate of sweating is directly related to our body temperature.

Remember, the more you sweat the more you lose water. So, the next time you go out in the sun, make sure you drink enough water because, like the room cooler, the system under your skin needs water to function.