What does "leukonychia" refer to in nails?

Leukonychia refers specifically to the presence of white spots or streaks on the nails. This condition can result from a variety of factors, including minor trauma to the nail matrix, allergic reactions, or systemic health issues. The term "leuko" means white, and "onych" pertains to the nail, making the definition clear. White spots are often harmless and may grow out as the nail grows, but they can sometimes indicate underlying health concerns. Understanding leukonychia is important in cosmetology for nail care, as it helps in identifying nail health and hygiene issues that may need addressing.