Why is my Toenail Black?
A black toenail usually is due to bruising beneath the nail bed. Just as any other bruise the toe can be very painful and sensitive. Obvious types of injury, such as dropping something on your toe are often the cause of a black toenail. It can also occur when the toe has been fractured. In many cases this type of bruise can be self-treated, but if problems persists, see a doctor to determine the cause and best treatment method.