What is Cracking joints?
[[File:Knuckle_crack.ogg|thumb|Sound of cracking joints]] '''Cracking joints''' consist of the action of moving [[joint]]s to the point of producing popping or cracking [[sound]]s. This commonly occurs during deliberate [[knuckle]] cracking. This usually happens in the [[finger]]s. However, it can also happen in [[hip]]s, [[wrist]]s, [[elbow]]s, [[ankle]]s, [[knee]]s and [[toe]]s, particularly if they are moved into unusual positions. Cracking or popping usually happens due to cavitation within the joints, in particular cavitation related to [[synovial fluid]]. [[Category:Joints]] {{biology-stub}}