When to see a medical professional for black toenails?

Black toenails are one of the common problems in adulthood, but when should we go to see a medical professional for black toenails? Today, the nail supply expert Maryton will give you answers in this article. Just keep reading! In fact, black toenails can be the result of different factors, such as injuries or malnutrition. However, they can also be a sign of an underlying infection