The characteristic of nails that are narrow at the free edge and fold inward is referred to as?

The characteristic of nails that are narrow at the free edge and fold inward is known as pincer nails. This condition can create a sharp point at the end of the nail, sometimes causing discomfort or pain, as the curvature can crowd surrounding tissues and create pressure. Pincer nails can lead to challenges during nail care and may require specific techniques or approaches for filing and shaping to avoid further complications.

The term "plicatured nails" refers to a different type of nail deformity where the nail plate itself has a pronounced fold, often creating a more complex structure but not necessarily related to the width at the free edge. "Tile-shaped nails" describe a broader nail that is flat and square at the free edge, while "onychomycosis" refers to a fungal infection of the nail, not a specific shape or size characteristic. Understanding these distinctions is crucial for nail care professionals when assessing and treating various nail conditions.