- Put nail polish on nails all the time.
- Put hot sauce on nails.
- Have someone help you and if they catch you biting your nails they can say something about it. I would recommend someone like a best friend or a close relative.
- If you are old enough and can afford it, get either a gel overcoat or nails.
Dip the tips of your fingers in fish oil, it'll stop you from biting your nails because it'll taste disgusting.