Why does your temperature if your sick go up at night?!
Question: When you sleep is when your body is able to heal and repair the most. The body will often raise the temperature to help fight illnesses (which is also what a fever is and why it happens when you're sick... but that's a higher level of temperature increase).
Basically, it's just more convenient because your immune system doesn't have to worry as much about working on other things (like tissue repair from sun damage, for example) while you're asleep.
Answers: When you sleep is when your body is able to heal and repair the most. The body will often raise the temperature to help fight illnesses (which is also what a fever is and why it happens when you're sick... but that's a higher level of temperature increase).
Basically, it's just more convenient because your immune system doesn't have to worry as much about working on other things (like tissue repair from sun damage, for example) while you're asleep.