Mosquito bites are the ultimate temptation—the little red welts are just itching (get it?) to be scratched. When you finally give in, scratching feels oh so sweet. That's because the process releases dopamine and drowns out the itchy sensation, though it doesn't necessarily get rid of it.

This itch-scratch cycle isn't a big deal for most of us (though we bet you're feeling itchy just reading this story), but it can become a real problem if you have eczema, psoriasis, or a similar disorder.

Researchers are exploring why we itch to help chronic scratchers find relief. For now, this video from HowStuffWorks does a good job explaining the theories being tested.

READ THIS NEXT: These 8 Bug Sprays Are Useless Against Zika

Take on too much in the New Year?

We'll make crushing your goals a whole lot easier by sending you a healthyish idea you can do every day.
Sign up to get healthy ideas
via Facebook Messenger

Sign up for a daily healthyish text message

Status Available in the U.S. and Canada only. Clicking "SIGN UP" means you would like to receive text messages from Greatist. Msg & Data rate many apply. Text STOP to cancel or HELP for help.