What makes the sound when your back cracks while stretching, and why can’t the sound be made again until later when it needs to be cracked again?

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What makes the sound when your back cracks while stretching, and why can’t the sound be made again until later when it needs to be cracked again?

In: Biology

In each joint there are gasses. These gasses can get released when the joint gaps. It’s nitrogen gas that gets released. The joint doesn’t fill up with gas again until 30-60min after you “crack” it

You may actually be re-positioning the discs between the bones in your spine. You can’t do it again until the discs have settled out of position again. I know this because I had to have 3 discs removed from my spine and the 4 bones surrounding them fused together.