From trauma to a toenail fungus, there are many reasons why you may have a black toenail. Here's what it means, how to treat ...

A subungual hematoma can make your nail appear red or purple. Eventually, this will change to a brown or black color ... Subungual melanoma develops under the toenail and, depending on the ...

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Dealing with toenail fungus, or onychomycosis, can be a frustrating journey for millions of people worldwide. It often starts with a small yellow spot under the ... light and red light wavelengths.