Why does scratching your head feel so damn good?

A release of serotonin, dead skin cells, and the relationship between your brain — and pain?

She looks like she’s got an itch NOTHING can scratch. (Photo by freestocks on Unsplash)

If you’ve ever endured a nasty case of chicken pox, or a camping trip that resulted mosquito bites, you know the amazing feeling that comes with scratching an itch. It’s an immediate, almost orgasmic flood of relief and…