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Lots of reasons: When you say "lines" it is difficult to say as there are many types of lines. The most common lines seen are longitudinal (running along the length of the nail). More specifically, longitudinal melanonychia means dark lines along the nails. This can be variant of normal, particularly in persons with dark skin. However, any new line of pigmentation should be evaluated by a dermatologist. ...Read more
Consider psoariasis: Especially nail has little pits too.Get a more detailed answer ›
I've noticed small/thin black lines keep appearing under the tips of my fingernails over the past few days. What could this be from?
Splinters: Thin longitudinal black lines under fingernails can be what doctors call "splinters" & can reflect tiny blood clot emboli that get caught there, where there are end arteries & capillaries. Such tiny clots end up there after being generated inside left chambers of heart. Cardiologist exam indicated & urgently if dizzy, feverish, chest pain, irregular heart beats or shortness of breath. ...Read more
Are splinter looking brown lines under fingernails something to worry about? There aren't any other symptoms present.
Trauma vs infection: The most common cause of splinter like hemorrhages seen through the nail in the ail bed, come from trauma. I've had them in the past from tapping my nails on the desk. I had to break the habit. Splinter hemorrhages as signs of infection are more often seen at the base of the nail near the cuticle. Again, the most common cause of these hemorrhages is trauma, even as minor as tapping your nail. ...Read more
What could it mean if you have dark reddish purple horizontal lines come under all your fingernails?
See a physician: I think the safest thing to do is see a doc. This could be nothing, just small trauma to your fingers, to certain deficiencies, to some pretty severe cardiac issues. Have you been extremely sick lately? Sometimes serious illness can cause this afterwards. Are you having any heart or breathing issues? If so see a doctor sooner. Without more history, i would say the safest thing is to see a dr. ...Read more
Purple line on nail: Fingernails can have many different signs. Purple lines may represent a couple different things; mole/freckle at the nail base or splinter hemorrhage. The latter is not specific to any disease state, but may be a sign of something else that is going on. If you recently injured your nail bed, that might be a sign of bruising. http://en.wikipedia.org/wiki/splinter_hemorrhage. ...Read more
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