Black Toenail Treatment

Black toenail treatment is usually fairly safe. It is usually just some dry blood, but sometimes if can be dangerous.

Black Toenail:

  • If it is a thick black line it may be dangerous, this can be a melanoma!
  • But if it is a black spot under the nail, then it is most likely blood.
  • This is most commonly due to injury or improper shoes during exercise.
  • But don’t worry, it’s almost never dangerous.



Why Is My Toenail Black?
  • The #1 cause for your toenail turning black is a subungual hematoma.
  • This is simply blood underneath the toenail.
  • This can happen in either a severe injury, or even just light painless rubbing during walking.
  • It can be scary if it just appears for not reason, but usually tight shoes or new shoes can be to blame!
  • Treatment involved mainly just getting a good pair of new shoes.
  • I’ll show you how to do that!
  • If the toenail is loose, don’t worry it will basically always grow back.
  • But be warned, toenails grow back slow- up to 1 year sometimes!
Black toenail from bleeding
Why Is My Toenail Turning Black? If it is on both toes without injury, this is almost always due to runners toe. This is constant friction to the toes, this causes rupture of blood vessels underneath the toenail.


Black Toenail Causes:
  • The most common cause is an injury to the big toe.
  • The second most common cause is a runners black toe.
  • A runners black toe is due to constant rubbing in the shoe, this may even be painless!
  • The third most common cause may be black toenail fungus.
  • This may be a misconception, toenail fungus is almost always thick yellow toenails.
  • The fourth most common cause is the most dangerous; A mole that may be suspicious.
  • If you have a black mark or black line that has been there for months or years, make sure to analyze it!
  • This could be black toenail melanoma.
Black Toenail Causes
The most common causes of black toenails are: injury, after running, a melanoma and fungus!


Big Toenail Turning Black Symptoms:

  • Black and blue toenail discoloration.
  • Black toenail after running.
  • Black line in toenail (consider black toenail melanoma).
  • Black dot under toenail.
  • Pain after black toenail injury.
  • Possible bleeding from under the black toenails.


black toenail running
A toenail turning black after injury can be pretty scary! But don’t worry it will regrow normally in almost all cases. But be warned, it can take almost an entire year if it is the whole nail.


Black Toenail Treatment:


The most common causes of a toenail turning black are injury, runners black toenail, black toenail fungus and a black mark on toenail due to melanoma:


1)Black Toenail Injury:

  • This is by far the most common cause of a black and blue toenail.
  • This is usually obvious when it happens, because something falls or stubs your toe!


Black Toenail Injury Treatment:

  • There is nothing really do here except wait for the toenail to grow back.
  • It can take up to 1 year to have it grow back!


Check out our toenail falling off guide!



2) Black Toenail Running:

  • A black runners toe is possible in two ways: long distances and improper shoes!
  • It is usually some combination of both that leads to this type of toenail.
  • Also consider this if you have black toenails on both feet.


Black Toenail Running Treatment:
  • Use a Brannock device to measure your shoes.
  • Make sure there is enough room at the big toe and the pinky toe.
  • These two spots are the most important!


3) Black Toenail Fungus Treatment:
  • Toenail fungus is usually yellow, thick and crumbly.
  • But if you have thick black toenails, it may be a combination of both.

 Black Toenail Fungus Treatment:


  • There are many home remedies available for the treatment of black toenail fungus.

Check out our complete toenail fungus guide!


4)Black Line In Toenail:
  • A black line in the toenail may be a melanoma, a type of skin cancer.
  • But don’t worry, this is very rare.
  • Most lines are not dangerous.


Black Line In Toenails Treatment:

Some things to consider:

  • The thickness of the black line.
  • Any extension from the toenail into the skin?
  • Any toenail deformity?
  • Any bleeding or non-uniform changes?

Jump To The Black Streaks In The Toenail Page.