Is it true that one of the causes of athritis is cracking your knuckles, I have a really bad habit of doing this!?

No. I read somewhere recently that cracking your nuckles did nothing to the joint, in fact, it said it was good for it. I was very relieved because my youngest does this all the time.

Mimi is right, you do not get arthritis from cracking your knuckles. That's just another of those things that parents told their kids, like you'll catch cold if you go out in the cold with your hair wet.