What is melanonychia?

Melanonychia refers specifically to the darkening of fingernails or toenails, which is characterized by pigmentation changes in the nail plate. This condition can result from several factors, including genetics, trauma, or underlying health issues. The presence of pigmentation can indicate a range of conditions; therefore, understanding melanonychia is important for proper diagnosis and treatment.

The other options represent different nail and skin conditions. Ridges on nails pertain to changes in texture rather than color, while discoloration of the skin around the nail refers to issues involving the skin rather than the nail itself. Excessive cutting of the nail involves nail trimming practices and does not relate to pigmentation or darkening. Each of these alternatives highlights different aspects of nail care but does not accurately describe melanonychia.