Leuconychia is a condition characterized by what visible feature on nails?

Leuconychia is specifically characterized by the presence of white spots or streaks on the nails. This condition can occur due to various factors, including minor trauma to the nail matrix, which results in these distinctive white marks. Often, these spots do not cause any harm and may grow out as the nail grows. Their visibility is a clear indicator of leuconychia, which differentiates it from other nail conditions that might present with different colors, structural changes, or thinning. Understanding the specific features of leuconychia helps in recognizing the condition accurately, as it contrasts sharply with symptoms associated with yellowing, cracking, or thinning of the nails, which are indicative of other possible nail health issues.