Indented, vertical lines down the nail plate are known as what?

Indented, vertical lines down the nail plate are referred to as furrows. These lines can occur for various reasons including trauma to the nail matrix, underlying health conditions, or sometimes simply as a result of aging. Furrows can also indicate disruptions in nail growth, and they may become more pronounced if there is a significant issue at the nail bed.

The other terms relate to different nail conditions or abnormalities: leuconychia refers to white spots or lines on the nails, pterygium involves the skin growing onto the nail plate, and onychophyma refers to an overgrowth of the nail or thickening of the nail plate. Understanding these distinctions is crucial for effective diagnosis and treatment in cosmetology practices.