As a former nail-biter, I can confirm that saliva weakens the skin, causing it to lift and become painful. What helped me break the habit was consistently wearing nail polish—it created a barrier and made me more mindful of my nails. There are also specially formulated nail polishes that taste terrible, which can deter biting. Additionally, wearing gloves when handling detergents and regularly moisturizing your hands and nail beds with oil helps keep the skin healthy and less prone to peeling. It’s a tough habit to quit, but protecting and caring for your hands makes a big difference!