Top
10
Doctor insights on: Black Line On Toenail Causes

Share
1

1
What causes black toenail?

What causes black toenail?

Blood,fungus,other: The most common causes of black toenails are old blood from trauma and fungal infections. There are other dermatological and hematological causes, but they are not common. ...Read more

See 2 more doctor answers
Dr. Arnold Beresh
340 doctors shared insights

Toenails (Definition)

Toenails are the hard coverings at the end of the toes. Nails are made out of a protein called keratin. They function to protect the end of the toe and to increase sensitivity of touch. Good nail care is important to prevent ...Read more


2

2
What causes black lines in the toenails?

What causes black lines in the toenails?

Various things: In people with skin of color it may be a normal variation. Skin growths may also cause them, both of the benign and malignant kind. See your dermatologist. ...Read more

See 1 more doctor answer
3

3
What causes black and blue toenails?

What causes  black and blue toenails?

See a podiatrist: If you are runner, this is a common injury called "black toe syndrome" due to blood bruises under the nail plate. Other causes of black toenails are infections - either bacterial or fungal. Another cause may be from a fracture in the last bone of the toe. In any case, see a podiatrist who can examine and treat any of these conditions and recommend ways to prevent recurrence. ...Read more

See 1 more doctor answer
4

4
What can cause black/purple toenail root?

Injury: Usually some time of injury will cause discoloration due to bleeding under the nail. ...Read more

8

8
My husband has a toe nail that is rotten & black & the nail is coming off , what could be the cause ?

Most likely Fungus: This sounds like a fungal infection of the toenail. There are various treatment options. Topicals don't work well, but may if you are aggressive with treatment. Oral medication may be needed. This conditiion may be caused by repetitive trauma. Have him see your local podiatrist for evaluation and treatment options. Dr l. ...Read more

See 2 more doctor answers
9

9
About a month ago half my toe nail turned black. It hasn't gone away or even lessened. What's the cause and how to get back to normal color?

About a month ago half my toe nail turned black. It hasn't gone away or even lessened. What's the cause and how to get back to normal color?

Dry blood: It is very common to have bleeding under the toenail without an injury. Everyday walking causes pressure from the toenail hitting the shoe, which can cause tearing of the nail plate from the nail bed which will make the nail look black. In most cases this is self-limiting. However rarely this can be melanoma And needs to be evaluated. ...Read more

10

10
Can paint thinner cause black toe nails?

Can paint thinner cause black toe nails?

It can contribute: Pain thinner directly would not cause the discoloration but thinning out of the nail plate due to the chemicals could cause the toenails to become vulnerable to infection by fungus, yeast or bacteria. ...Read more