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Doctor insights on: Black Streaks Under Toenail

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I have little black seed looking dots under my toenail.. What is it?

I have little black seed looking dots under my toenail.. What is it?

Splinter : Hemorrhages is a possibility. Can get that from trauma to the nail can also be seen with bacterial endocarditis. ...Read more

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Dr. Adam Smith
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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


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Both big toenails discoloured, blue looking; right one particularly looks as though black streak in it. Slight pain but nothing major. What to do?

Both big toenails discoloured, blue looking; right one particularly looks as though black streak in it. Slight pain but nothing major. What to do?

Microtrauma: It sounds like your toenails are hitting the end of your shoe. This usually happens if the toe box is either too small (toe is pressed up against the end) or too large (foot is sliding around and the toe is hitting the end). This is very common in runners--it can lead to either thickening of the nail, or it may eventually turn black and fall off--a new nail will grow in within a year. ...Read more

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Dr. Adam Smith
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I have a black spot under my toenail. If it's growing out should I be concerned. I?

I have a black spot under my toenail. If it's growing out should I be concerned. I?

Bruise: Sounds like you have a subungual hematoma, also knows as a bruise under your nail. This occurred due to trauma. The nail usually takes between 12-18 months to grow out fully so eventually that spot will grow out and you will be able to cut off the nail. ...Read more

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I'm 37, black and a weightlifter. I hurt my big toenail last year. It fell off. Now, i saw 2 or 3 faint streaks in the part growing back. Is there any cause for concern?

I'm 37, black and a weightlifter. I hurt my big toenail last year. It fell off. Now, i saw 2 or 3 faint streaks in the part growing back. Is there any cause for concern?

Probably not: Discoloration of a nail after trauma isn't unusual. As long as the mark moves and is replaced by clear nail, it generally isn't a concern. ...Read more

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Dr. Adam Smith
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Hi, so I went on hikes with backpacks that weigh about 60 pounds or heavier. My toenails are now black. Or there is just dried blood under them.

Hi, so I went on hikes with backpacks that weigh about 60 pounds or heavier. My toenails are now black. Or there is just dried blood under them.

Trauma: with added weight especially hiking more pressure is forced to the toes for added push off and also ground force pushing against bottom of toes into shoes causing trauma ...Read more

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If under my toenail it turns black and blue will the nail fall off?

If under my toenail it turns black and blue will the nail fall off?

Not necessarily.: No doubt there has been trauma to the toe and the bruise is trapped under the nail. Depending on how extensive the bruise is and the pressure it may have caused will make a difference as to whether you'll loose the nail or if it will quiet down after proper first aid. ...Read more

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I have 2 small black spots at the base under my middle toenail. I don't recall banging it but was stepped on once. I don't know if it has grown?

Trauma: It is nit unusual for that discoloration to occur under a toenail that has been traumatized and it may last weeks. If you have more concern, consult a podiatrist for evaluation and advice. ...Read more

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There is a black spot under my left big toenail! it doesn't hurt and I have not dropped anything on it. it is a blackish/purple colour?

Could still be blood: Or fungus based on your description. Melanoma is always a possibility as well. See a foot doc or dermatologist and have it looked I at. ...Read more

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Dr. Adam Smith
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