There are "stop biting" nail polishes on the market that you might try. You can try a bitter tasting liquid and apply a liberal amount of the solution to the nails, cuticles and surrounding skin every morning.

Use gum to keep your mouth active.

And as nail biting is an unconscious reaction to worry or stress or an underlying concern, you might want to talk to a counselor or psychologist about the habit.

ok. What my grandmom did to me was put this bad taste luquid thing on my nail everyday on my nails before i left to school. Is so something you use to make shampoo and medicine. Is called Sabila. If you don't know what it is, google it. So, my grandma used to cut a litle bit on the end and use the slimy liquid on my nails, this kept me from bitting my nail, because their is not treatment to get rid of addiction, you can make yourself not use it. You can try this and you will once in awhile try to bite your nail but you will taste something bad, this will keep you from biting it the next time. Hope this really helps. Because biting nails is really dangerous these day when you shake hands with somebody, touch something, dirty hands, or other things that will bring microbes to you hands

be glad that is your only addiction. read around in this site and then feel fortunate, honey.