So if you're having a bad day, having a good cry can make you feel a little bit better. And that might be, it might be, because it cools your brain down a bit. And I mean that literally.

See when you're sobbing really hard, like maybe because this one piece of your hair just won't go down and it's really, just, making you feel bad about yourself. You start taking a lot of really short fast breaths and that brings a lot of cold air into the back of your throat and your nose. 

Just under the surface there there's a bunch of blood vessels that are carrying blood to your brain. The blood in those vessels cools down and so does, a very small amount, your brain.

Scientists hypothesize that this temperature change, even though it is very small, is enough to actually change the way the chemicals in your brain behave. Ultimately putting you in a better mood. This is actually one of several reasons why crying might actually help you feel better.

So if you're having a rough time, have that cry. It might actually help chill you out.