What is the best practice for filing nails to avoid damage?

Filing nails in one direction is considered the best practice to avoid damage because this technique minimizes the risk of splitting and tearing the nail. When filing in multiple directions, particularly back and forth, it can create friction and weaken the nail structure, leading to cracks and splits.

By focusing on a single direction, the nail edge is smoothened effectively without introducing stress that can come from aggressive filing techniques. This method is gentle, allowing the nail to maintain its integrity and reducing the likelihood of damage. Maintaining a careful and consistent approach when filing also helps ensure a neater and more professionally finished look.

In contrast, filing in a circular motion can lead to uneven edges and potential damage as it may catch or snag on the nail, while only filing the tips might ignore the overall health of the nail and lead to issues if the sides and length aren't properly managed.