While prepping your nails to care for your cuticles before filing, do you soak them? This could be the culprit. Soaking your nails causes them to expand when they are wet and shrink as they dry causing nails to peel, split and break when you file them. Instead try applying a cuticle cream or oil to cuticles to soften them while maintaining your nail strength. If this does not apply to you, perhaps you have an allergy to formaldehyde, an ingredient in nail hardeners and some nail polishes.
Other possible causes could be acetone polish removers; which dry out the nail plate. If you are still experiencing splitting and peeling, it could be a sign of a nutritional deficiency such as a lack of calcium, minerals or essential fatty acids. Try to avoid acetone removers and nail polish to see if there is an improvement. For a “natural” shiny manicure, try Tweezerman's File, Buff and Shine. Try our sister brand, alessandro, for NailSpa products specifically targeted towards brittle nails with calcium. Looking for nail polish to bring to the salon? Try our 99 color selection from alessandro.