When you crack your knuckles, the popping sound doesn’t come from bones grinding together. It’s caused by a process called cavitation, where stretching the joint rapidly lowers pressure inside the synovial fluid, allowing gas bubbles to form and then collapse. This sudden change creates the familiar “pop.” Research shows that occasional knuckle cracking does not cause arthritis, though repeated forceful cracking may irritate surrounding tissues or reduce grip strength over time. The sound may be
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