What Causes a ‘Fever’ and Why Do We Sweat When We’re Sick?

A fever is when your body gets hot to fight off a monster like a virus or bacteria.

What Causes a Fever

Your body has tiny soldiers called white blood cells that fight invaders. When they see something bad, like a cold germ, they send out signals to make you feel warmer. This warmth helps speed up the battle so your body can beat the invader faster.

Think of it like turning on a heater in a room full of bugs, it makes everything happen quicker!

Why We Sweat When Sick

When your body gets hot from fighting the bad guys, it needs to cool down. So it uses sweat, tiny droplets that come out through your skin. The sweat helps take some heat away, like when you wipe your forehead with a wet cloth on a hot day.

Sweating is your body's way of saying, "I need to cool off so I can keep fighting!" It might feel uncomfortable, but it’s helping you get better. A fever is when your body gets hot to fight off a monster like a virus or bacteria.

What Causes a Fever

Your body has tiny soldiers called white blood cells that fight invaders. When they see something bad, like a cold germ, they send out signals to make you feel warmer. This warmth helps speed up the battle so your body can beat the invader faster.

Think of it like turning on a heater in a room full of bugs, it makes everything happen quicker!

Why We Sweat When Sick

When your body gets hot from fighting the bad guys, it needs to cool down. So it uses sweat, tiny droplets that come out through your skin. The sweat helps take some heat away, like when you wipe your forehead with a wet cloth on a hot day.

Sweating is your body's way of saying, "I need to cool off so I can keep fighting!" It might feel uncomfortable, but it’s helping you get better.

Take the quiz →

Examples

  1. A child gets a fever from a cold, and starts sweating to cool down.
  2. Your body feels hot when you're sick because it's fighting off germs.
  3. After being sick for days, your body cools down by making you sweat.

Ask a question

See also

Discussion

Recent activity