Learn how to stop biting your nails using these 5 simple tips! Break the bad nail biting habit once and for all. Although nail biting itself is rarely harmful, with persistent biting the nail bed and the cuticle the hard skin that surrounds the bottom and sides of the nail can become injured and predispose you to skin infection. Nails become easily treatable and it could lead to permanent nail damage. It also can make you feel embarrassed by the appearance of your nails and cuticles. Nail biting is a hard habit to break, but that is why we are going to tell you five different ways to tackle the problem and break this bad habit for good. Here are my 5 simple ways to stop biting your nails.