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A 30-year-old female asked:

why is black under my toe nail?

4 doctor answers8 doctors weighed in
Dr. Donald Nino
Family Medicine 38 years experience
Toenail: If you have recently stubbed the toe or dropped something on it, that could be old blood under the nail. Fungus can grow under a nail and give a black coloration. Sometimes a mole will form at the base of a nail and discolor it as it grows out. See your doctor if you want to get a diagnosis.
Dr. Emily Altman
Dermatology 28 years experience
Black toenail: A number of things can make a toenail/portion of the toenail look black: fungal infections, blood under nail, certain medications, inflammatory conditions. With meds, most/all nails are involved. Moles/freckles in the nail growth center (matrix) give linear pigmented brown or black streaks, so can melanoma. If the discoloration of the nail is new, please see your dermatologist for proper diagnosis.
Dr. Bac Nguyen
Family Medicine 23 years experience
Trauma or not?: If it was from trauma i.e. You dropped a brick on it causing a black nail..You will eventually get it back, with a new nail of course. If no trauma at all and just started turning dark underneath slowly and growing, i would have it evaluated for possible melanoma..Subungal melanoma, which is quite rare, but happens..Don't mean to scare you, but that is all i got from your question.. Good luck.
Dr. Arnold Beresh
Podiatry 41 years experience
See a podiatrist: If you injured the toenail and it is now black, it is probabley from blood under the toenail. If it is painful, you should have the blood drained. It should be looked at by a podiatrist to determine what to do.

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Similar questions

A 41-year-old member asked:

Half of my toe nail is brown/black, what could be the cause?

2 doctor answers3 doctors weighed in
Dr. Glenn Aufseeser
Podiatry 9 years experience
Many things: Many things can cause discoloration of a toe nail. It could be blood resulting from a history of trauma or a fungal infection. I would advise seeing a podiatrist or dermatologist to rule out anything more serious, such as melanoma.
A 35-year-old male asked:

What does a black line on my toe nail mean?

2 doctor answers3 doctors weighed in
Dr. Jeffrey Kass
Podiatry 28 years experience
Answers include: Possible lint from sock, blood, normal variant or possible melanoma. Should be examined by a doctor. The latter is dangerous.
Sacramento, CA
A 26-year-old male asked:

Black line on my toe nail?

2 doctor answers2 doctors weighed in
Dr. Jeffrey Bowman
Podiatry 38 years experience
Black line: The black line could be from a number of causes but play it safe and get a small biopsy. I have seen melanoma from one case the others were fungus or subungual hematoma.
A 16-year-old female asked:

Why is my big toe nail black?

3 doctor answers5 doctors weighed in
Dr. David Tobin
Podiatry 38 years experience
Blood: Most common reason is a collection of blood under it from trauma or long distance running. Less common is a melanoma.
Burke, VA
A 39-year-old female asked:

Why the the big toe nail turn black?

2 doctor answers10 doctors weighed in
Dr. James Long
Internal Medicine 9 years experience
Black nail: The most common cause of a. Lack nail is bleeding into the nail bed from trauma. Fungus can do it and in rare instances other disorders.

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Last updated Nov 20, 2019

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