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A member asked:

When people say 'cracking their knuckles' by stretching out their fingers, what is actually happening?

A doctor has provided 1 answer
Dr. Tony Ho answered

Specializes in Internal Medicine

See below: It actually isn't well understood; the prevailing theory is that the motion causes a small cavitation bubble in the synovial fluid, which collapses and causes a sharp sound.

Answered 9/28/2016

5.2k views

Thank

Related Questions

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I stopped cracking my knuckles but throught out the day my finger feels really painful and sore.. Why is this, should I be concerned?

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What do you advise if i stopped cracking my knuckles but throught out the day my finger feels really painful and sore.. Why is this?

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How bad is cracking your knuckles? I have to its like when I don't crack them my fingers kinda hurts..Well not hurt but its like I have to do it. Help

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