Fish tree paella

What does it mean when my joints constantly crack? - crack for rhinoceros 4.0 evaluation

First, I am almost 16 years, and I am in good condition.
My left shoulder, cracking his collarbone broken arm every time, no matter how often I turn to the shoulder, to always constant crack crack my fingers. Whenever I lift something heavy, elbow, wrist or cracks, and no matter who it is, the arm. My right ankle cracks and when I a part of the flamenco style.
No idea what could be wrong with me?
I doubt his lack of calcium, so that I am at a loss about what else they could.