Scientists from UC Davis Medical Center, USA, made it their goal to find out what impact the habit of cracking your knuckles has on your joints. The information we got from Bright Side answers if this habit is dangerous or not.
A lot of people think it is and we agree.
Source: https://brightside.me/inspiration-health...
Roughly speaking, a joint is a place where two bones connect, packed in a joint capsule that is filled with liquid. When we crack our knuckles, the space between our bones expands. The joint liquid becomes insufficient to fill the gap, the pressure inside falls, and a bubble filled with gas appears. The sound we hear, therefore, is the pop of this bubble when it breaks.
30 had the habit of cracking their knuckles, while the other 10 subjects had never done this — at least not on purpose.
It might be a good prevention tactic for joint diseases, but this issue is yet to be researched.
And, of course, that it’s just annoying. 
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