4 doctors weighed in:

Why do our bones crack?

4 doctors weighed in
Dr. Aaron Segal
Family Medicine
3 doctors agree

In brief: Nitrogen bubbles

The cracking sound comes not from your bones, but rather the fluid filled joints between them. When the joint is stretched, pressure changes within the capsule cause small bubbles of nitrogen to form. These gas bubbles cause the classic cracking or popping sound.

In brief: Nitrogen bubbles

The cracking sound comes not from your bones, but rather the fluid filled joints between them. When the joint is stretched, pressure changes within the capsule cause small bubbles of nitrogen to form. These gas bubbles cause the classic cracking or popping sound.
Dr. Aaron Segal
Dr. Aaron Segal
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