Which term describes split or brittle nails with lengthwise ridges?

Onychorrhexis refers specifically to the condition characterized by split or brittle nails that exhibit lengthwise ridges. This condition can arise due to various factors, including physical trauma, excessive exposure to moisture, or certain health issues. In onychorrhexis, the structural integrity of the nail plate is compromised, leading to these visible changes.

The other terms describe different nail conditions. For instance, a pincer nail refers to a nail that has an abnormal curvature, often becoming pinched at the sides, rather than showing brittleness or ridging. Onychosis is a general term that encompasses any nail disease or condition, so it does not specifically address the characteristics of split or brittle nails with ridges. Nail pterygium refers to the presence of excess skin that adheres to the nail plate, which is unrelated to the brittleness or ridging of the nails. Understanding these distinctions is crucial for accurately identifying nail conditions.