Bleeding or bruising under an injured nail
will cause a black or purplish appearance. You may need to have the
blood drained from under the nail. The black appearance will most often go away
as the injury heals, but this may take weeks.
black appearance under an injured nail may mean damage to the nail matrix,
the area where the nail first begins to form. If this is the case, it may be
necessary to remove the nail and repair the matrix.
Melanoma may give a black, irregular appearance to an
Blue nails may occur as a side effect of a
medication. Blue nails are also caused by problems that reduce the amount of
oxygen in the blood, such as
anemia, cold exposure, exposure to high altitude,
peripheral arterial disease, or
streaks occur normally in dark-skinned persons and are of concern only if they
are new or changing. Brown streaks may also be caused by a medicine or
Pale white nails may be
caused by nutritional disorders, such as
anemia or zinc deficiency, or other medical
White specks, spots, or bands
(leukonychia) in the nail are common with mild injury. You may not even have
been aware of the injury. These marks can last for weeks or months and go away
on their own without any treatment.
nails occur when the nail separates from the nail bed (onycholysis) because of
an injury, a skin condition, or an infection. It is also caused by medical
problems such as chronic lung disease or cancer. Nails can also become yellow
from smoking cigarettes or from using some nail polishes, especially red
How this information was developed to help you make better health decisions.