What is a common problem that can occur due to improper filing of nails?

Nail splitting is a common problem that can occur due to improper filing techniques. When nails are filed inappropriately—such as using a rough file, filing back and forth instead of in one direction, or applying excessive pressure—it can compromise the integrity of the nail. This leads to weakened areas in the nail structure, making it more susceptible to splitting or peeling.

Filing should be done carefully and ideally in one direction to prevent fraying of the nail edges. Additionally, using the appropriate type of nail file for the specific nail type ensures that the filing does not create stress on the nails, thus reducing the likelihood of splitting.

In contrast, options related to increased nail strength, fungal infections, and staining are less directly associated with filing techniques. Increased strength is a result of proper care and nutrition, fungal infections generally arise from moisture and hygiene issues, and staining is usually related to exposure to pigments or dyes rather than the filing method.