When you crack your knuckles, gas is released. Where does this gas come from, and more importantly where does it “go” when cracked?

Question

When you crack your knuckles, gas is released. Where does this gas come from, and more importantly where does it “go” when cracked?

In: 100

Answer 1

The bubbles are made of oxygen, nitrogen and carbon dioxide. They build up in the fluid that cushions bones and lubricates your joints. It’s like your body’s motor oil.

Scientists thought that the sound was the bubble popping but more recently there’s been research showing the sound may be that of the bubble forming.