Cracking your knuckles Posted by Faheem | On 16 July,2013 | In Interesting Facts, Random Facts Cracking your knuckles Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting. 53cfac816ef6e32b3a61da7edd6ef1a9 Comments Tags:Bones, Bubbles, Cracking, knuckles