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Why do knuckles crack
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Why do knuckles crack

User Thomas Farvour
by
8.5k points

2 Answers

3 votes
Because all the movement and nonmovents your hands go through it builds up air and that air can be released by simply moving your hands or pushing down on them. Which "pops" them and makes the noise.
User AlbertoPL
by
7.8k points
4 votes
the pop your hear is air pockets poping

User Yahs Hef
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