8/27/2023 0 Comments Black stripesHere’s another example that always stuck with me. Gazing upon the hornless newsprint unicorn, you might call it a “white horse, with a few black stripes.” But from another perspective, it’s a black horse, whose body just happens to be covered in white stripes. Picture a zebra whose hair is 90% white and 10% black. roads now automatic, there’s nothing “standard” about manual transmission… except the fact that it was once the standard, and managed to hold on to the name. Daylight savings time may be more prevalent, but it’s newer, and hence “nonstandard.”Īnother case like this: “standard” vs. In this case, of course, “standard” is about what came first. But if you want to understand them – their structure, their origins, their kinship with NFL referees – then you’ve got to care about a question that you might previously have dismissed as a dumb game for philosophers.Īnd if you don’t like that ruling, you can appeal to the referees with the flowing black manes.Ĭommenting on my post on alternatives to daylight savings time, Douglas Magowan points out the strange fact that “standard” time occupies less than half of the year, and “daylight savings time” more than half.ĭoesn’t that change our sense of what “standard” is? If you just want to gaze at these mesmerizing test-pattern beasts, then the distinction is meaningless. Second, when developing in utero, the black comes first, followed by the white. First, beneath their hair, their skin is black (not white). The scientific truth: zebras are black with white stripes. Her wisdom is subverbal.)Īnyway, it feels silly. (The two-year-old didn’t have much to say on this. Inevitably we fell into the age-old question: Are zebras white with black stripes, or black with white stripes? On a recent trip to the zoo, we spent a while admiring the zebras. afp/2012/0415/p779.On the consequences of seemingly arbitrary distinctions What are splinter hemorrhages? /article/40466/health-what-are-splinter-hemorrhages What is a splinter hemorrhage? /article/486/splinter-hemorrhage aad.org/media/stats/prevention-and-care/nail-care nhs.uk/conditions/nail-abnormalities/Pages/Introduction.aspx diseases-conditions/endocarditis/basics/symptoms/con-20022403 diseases-conditions/endocarditis/basics/definition/con-20022403 Splinter hemorrhages of the nails: A systematic review of clinical features and associated conditions. things-your-nails-can-say-about-your-health/ 6 things your nails can say about your health. You can learn more about how we ensure our content is accurate and current by reading our editorial policy. Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. Your doctor may recommend further testing after your appointment if an underlying condition is suspected. When you see your doctor, expect them to take a medical history and perform a physical exam. Splinter hemorrhages that recur or are on more than one nail should also be reviewed by a doctor. Psoriasis may appear as a rash, patches, or scales on your skin, particularly on your scalp, face, hands, feet, and skin folds. For example, if you have endocarditis, you may experience symptoms like fatigue, a fever, pale skin, joint pain, and shortness of breath, among others. If you suspect the splinter hemorrhage is the cause of a more serious health condition, you should contact your doctor for an appointment. If you don’t already have a doctor, the Healthline FindCare tool can help you find a physician in your area. If the trauma has caused another condition or doesn’t seem to be healing on its own after several weeks, you should see your doctor. How is the cause of a black line on the nail diagnosed?Ĭontact your doctor if you’re sure a black line on your nail wasn’t caused by trauma. Up to 50 percent of those with psoriasis experience splinter hemorrhages and other nail conditions.Ĭauses of splinter hemorrhages vary and may include:īeau’s lines on all 20 nails may be a sign of: Psoriasis is a chronic skin condition that can manifest as silvery plaques, or scales on the skin. Psoriasis may also cause splinter hemorrhages. Endocarditis generally occurs in those with preexisting cardiac conditions. You may experience other serious heart conditions as a result of endocarditis. Endocarditis occurs when the inner chambers or valves of the heart have an infection. Fifteen percent of those with endocarditis have splinter hemorrhages. You may also experience nail trauma without even realizing it, such as when you squeeze something very tightly.Įndocarditis is a heart condition that may cause splinter hemorrhages. This can occur when something hurts your nail bed and bursts a blood vessel under your nail. Trauma is one of the most common causes of splinter hemorrhages. What are the causes of a black line on the nail?īlack lines on the nail can be the result of many conditions.
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