It's pretty well established that cracking your knuckles doesn't have any adverse health effects, but what's really happening ...

First, a quick anatomy lesson: ... This sudden inflow of fluid is the popping you feel and hear when you crack a knuckle, he adds. Historically, this hasn’t always been so obvious.

It's long been rumored that cracking your knuckles can cause arthritis. But MDs say this is likely not ... It might sound like a pop or a crack—and everyone’s anatomy is a little bit ...