Splinter hemorrhage
Tiny blood clots under nails, linked to various conditions.
Splinter hemorrhages are small blood clots that appear as vertical lines beneath the nails. Initially plum-colored, they darken to brown or black within a few days. These marks are not unique to any one disease and may be linked to several conditions, including subacute infective endocarditis, scleroderma, trichinosis, systemic lupus erythematosus, rheumatoid arthritis, psoriatic nails, antiphospholipid syndrome, hematological malignancy, and trauma.
In infective endocarditis, clots can travel from an infected heart valve through the bloodstream. If one lodges in a finger, it can damage the capillaries there, producing a splinter hemorrhage. Other causes include direct nail injury (trauma), systemic vasculitis (inflammation of blood vessels throughout the body), or a fragment of cholesterol blocking capillaries in the finger. Even among patients with infective endocarditis, only about one in ten will have splinter hemorrhages.
Quick Facts
- Differential
- subacute infective endocarditis, scleroderma, trichinosis, systemic lupus erythematosus (SLE), rheumatoid arthritis, psoriatic nails, antiphospholipid syndrome
Facts from the source article.
Lore & Background
Splinter hemorrhages are small, vertically oriented blood clots that appear under the nails. Initially plum-colored, they darken to brown or black within a couple of days. They are not specific to any single condition, but are associated with a range of disorders including subacute infective endocarditis, scleroderma, trichinosis, systemic lupus erythematosus (SLE), rheumatoid arthritis, psoriatic nails, antiphospholipid syndrome, haematological malignancy, and trauma.
Reader's Guide
Splinter hemorrhages serve as a clinical sign that can prompt investigation into underlying systemic conditions. In infective endocarditis, clots from the affected heart valve may migrate to finger capillaries, causing damage and resulting in splinter hemorrhages. However, only about 1 in 10 patients with endocarditis exhibit this sign. Other causes include direct trauma, systemic vasculitis (inflammation of blood vessels throughout the body), or lodging of cholesterol fragments in finger capillaries. Because splinter hemorrhages are not specific to any one condition, their presence requires careful clinical correlation with other symptoms and diagnostic tests. Their significance lies in their role as a visible clue that may point to serious underlying disease, though they can also result from benign trauma. The differential diagnosis is broad, and the finding alone does not confirm any particular illness.
Did You Know?
- Splinter hemorrhages are tiny blood clots that tend to run vertically under the nails.
- They are not specific to any particular condition.
- In infective endocarditis, roughly 1 in 10 patients have splinter hemorrhages.
- They can be caused by trauma, systemic vasculitis, or a fragment of cholesterol lodging in finger capillaries.
Frequently Asked Questions
What is Splinter hemorrhage?
Splinter hemorrhages are tiny blood clots that show up as thin vertical streaks beneath the fingernail or toenail plate. They first appear plum-colored and then shift to brown or black over the next couple of days.
What causes Splinter hemorrhage to appear?
They can stem from a broad list of triggers, including minor physical trauma, systemic vasculitis, cholesterol fragments wedging into capillaries, or embolic clots from an infected heart valve. No single disease is the sole source.
Which conditions is Splinter hemorrhage linked to?
Clinically they have been tied to subacute infective endocarditis, scleroderma, trichinosis, systemic lupus erythematosus, rheumatoid arthritis, psoriatic nail disease, antiphospholipid syndrome, hematological malignancy, and simple injury.
How does Splinter hemorrhage form in infective endocarditis?
In that scenario a small clot detaches from a damaged heart valve, rides the bloodstream to a digit, and becomes trapped in the capillary bed under the nail, producing the characteristic linear mark.
How common is Splinter hemorrhage as a sign of endocarditis?
It shows up in roughly one in a handful of affected patients, so it is a recognized but far from universal clinical clue rather than a standalone diagnostic marker.
More in Symptoms and signs: Skin and subcutaneous tissue 1-23
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced