There is no evidence to prove that cracking your knuckles is bad for your joints although people who crack their knuckles often have decreased strength in their hands over time. This is because you're always stretching the tendons and ligaments of the fingers and palm. I think the most commonly supported theory is that the cracking sound is caused by gases that build up in the little fluid-filled capsules that cushion your joints. When you stretch or compress the capsule the gas creates a bubble that "pops". Or so they say.....it's a really difficult habit to break. I only pop my pointer and middle fingers for some reason and I seriously can't stop. If it feels they need to be popped, I can't get it out of my head until I do it, or my fingers feel stiff.
But in answer to your question, yes it's absolutely normal.
I crack my knuckles all the time....
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There is no evidence to prove that cracking your knuckles is bad for your joints although people who crack their knuckles often have decreased strength in their hands over time. This is because you're always stretching the tendons and ligaments of the fingers and palm. I think the most commonly supported theory is that the cracking sound is caused by gases that build up in the little fluid-filled capsules that cushion your joints. When you stretch or compress the capsule the gas creates a bubble that "pops". Or so they say.....it's a really difficult habit to break. I only pop my pointer and middle fingers for some reason and I seriously can't stop. If it feels they need to be popped, I can't get it out of my head until I do it, or my fingers feel stiff.
But in answer to your question, yes it's absolutely normal.