Applying natural mehendi stains the nail plate without significantly weakening it, so occasional use is generally safe. Instant mehendi often contains chemicals and dyes that can dry out and damage the nail surface over time. Nail biting causes repeated trauma to the nail plate and cuticle, leading to weak, irregular, and infection-prone nails. Regular use of cuticle oil improves hydration, flexibility, and overall nail strength. Pushing the cuticle back too often disrupts the natural protective