What condition leads to the fragility and brittleness of nails?

• A. Paronychia
• B. Onychorrhexis
• C. Leukonychia
• D. Onychomycosis

Answer: (B)

Onychorrhexis is the condition characterized by the fragility and brittleness of the nails, leading to longitudinal ridges and splitting along the nail plate. This brittleness often stems from various factors, such as aging, excessive exposure to water or harsh chemicals, nutritional deficiencies, and underlying health conditions. When nails become brittle, they are prone to breaking easily and can develop an unhealthy appearance.

The other conditions listed have different characteristics and implications for nail health. Paronychia refers to an infection of the skin surrounding the nail, which can cause redness, swelling, and pain but does not specifically lead to brittleness. Leukonychia presents as white spots or lines on the nails, which often do not affect the overall integrity of the nail plate. Onychomycosis, a fungal infection, typically results in thickening, discoloration, and possibly crumbling of the nails rather than causing them to be fragile. Thus, the key distinguishing feature of onychorrhexis is its direct association with nail fragility, making it the correct answer.