[Reuben]

I used to have this problem too. I'd bite my nails so much that they'd bleed sometimes and become unsightly. I'd discovered a solution to this. Cut your nails often and all the way as much as possible, not until its so short, it hurts of course. With your nails cut short, there is no chance for your teeth to bite on them. More likely than not, it's the fact that you feel that your nails are long that prompt you to bite them. That's based on my experience anyway. Whenever I see my nails grow longer and has it colour change because there is no flesh behind it, I start biting. Good luck!