djpt448.64The cracking sound your joints make is the sound of gases being released.
Some people love it and some people hate it, but what is it that makes joint cracking so loud? When joints are stretched, the pockets of gas that get trapped between them are released. When these bubbles of oxygen, nitrogen, and carbon dioxide escape, they might make a popping or cracking noise. Whether or not intentional joint cracking is bad for your health has yet to be decided. Some scientists say it harmless, while others say it may lead to osteoarthritis.
