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black lines in my fingernails

A 22-year-old female asked:
Dr. Muhammed Ridhwan Khan
Specializes in
Lines on your nails: Hi, persistent lines on your nails could be something as simple as a fungal infection or it could be a sign of an underlying medical condition. I woul ... Read More

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A 47-year-old member asked:
Dr. Richard Bensinger
51 years experience Ophthalmology
Dermatologist: Your dermatologist is the best source for determining the cause and treatment of black lines in fingernails.
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A 53-year-old female asked:
Dr. Laurence Badgley
52 years experience General Practice
Blood clots : Tiny blood clots, usually broken off from heart valves then float to the end arteries of the fingertips and get caught in the capillaries of the nail ... Read More
A 56-year-old female asked:
Dr. Mandakini Patel
40 years experience Pediatrics
Nail issues: The best thing would be to have it checked out as it could be anything from fungal infection to injury or other disease. If you have ridges it could a ... Read More
A 31-year-old male asked:
Dr. Ward Dean
Dr. Ward Dean answered
42 years experience Anti-Aging Medicine
Splinter hemorrhage: It's called a splinter hemorrhage. If you only have them occasionally, don't worry about it.
A 24-year-old female asked:
Dr. Laurence Badgley
52 years experience General Practice
Splinters: Thin longitudinal black lines under fingernails can be what doctors call "splinters" & can reflect tiny blood clot emboli that get caught there, w ... Read More
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A 49-year-old female asked:
Dr. Ed Friedlander
43 years experience Pathology
Splinter bleeds?: If you're describing splinter hemorrhages (there many web photos for you to compare), you'd do well to show them to your physician, though this isn't ... Read More
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A 16-year-old male asked:
Dr. Glynis Ablon
28 years experience Dermatology
Don't be scared: Have you family make you an appointment to see dermatologist to diagnose. Nails can change color for many reasons, and usually nail fungus is yellow a ... Read More
A 26-year-old male asked:
Dr. Anshul Gandhi
7 years experience Emergency Medicine
Splinter Hemorrhage: A splinter hemorrhage can occur for a variety of reasons and may be harmless or a sign of a more serious health condition. If caused by trauma these ... Read More
A 47-year-old female asked:
Dr. Adam Bodian
34 years experience Dermatology
Not necessarily: If it appeared quickly, like over night, then it most probably is trauma. It may also be a mole growing in the area or a fungus. Smokers may get som ... Read More

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