Nailbiters live of claws and nails. They are not picky and nom on the tips of your fingers. Some are vicious and tear out whole nails, but most of them just manage inconvenient cracks.
How to fight it
They're inconvenient, but rarely painful or dangerous. By keeping your nails short and not hitting your fingertips with blunt objects, you keep the N. away. They rarely go for the part of the nail that is still attached to the skin.gab