I was a nail biter from about 2 years old until a couple of years ago... I'm 37 now.... the trick for me was becoming content in my life but also keeping nail polish on them. Even if it was clear polish. Sometimes it meant applying a coat daily but I didn't want to mess up the polish so didn't bite... try it and see if it works for you. Also, there is something you can buy, it's located by the nail polish in the store and it's called 'nail biter'. It tastes awful!!!