What is a common characteristic of nails affected by melonychia?

Nails affected by melonychia exhibit a darkened appearance, which is due to the increased production of pigment cells known as melanocytes. This condition is characterized by the presence of melanin, the pigment that gives color to skin and hair, accumulating in the nail matrix. As a result, the nail plate may appear brown or black, often in bands or stripes. This coloration can vary in intensity and presentation, depending on the underlying cause of the increased pigmentation, which can be genetic, caused by trauma, or due to certain medical conditions. Understanding this characteristic is important for nail technicians and professionals to differentiate between normal variations in nail color and potential pathological changes that may require further investigation.