Fortunately, a few practical changes can make it easier to stop biting your nails. Also see: Winter nail care tips to make your manicure last longerIdentify what triggers youStart by noticing when you bite your nails. Also see: Things to avoid if you want healthy nailsMake biting less appealingAccording to Healthline, a bitter-tasting nail polish designed to discourage nail biting can be useful. Habit-reversal training uses awareness and a competing action to replace unwanted repetitive behaviours, including nail biting. If nail biting is persistent, causes significant damage or feels impossible to control, consider speaking to a healthcare professional.