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Published on: 8/20/2026

Can splinter hemorrhages be a sign of endocarditis?

Splinter hemorrhages can be a sign of endocarditis, but they are not specific to it. These small, reddish-brown lines under the fingernails or toenails may also appear with trauma, psoriasis, vasculitis, or other systemic conditions. Because splinter hemorrhages can point to something minor or something more serious, context matters—especially if they appear alongside symptoms like fever, fatigue, or heart palpitations.

If you've noticed splinter hemorrhages and aren't sure what's causing them, don't guess. Take a free, instant, online symptom check to explore possible causes based on your specific symptoms and get clear guidance on next steps. It only takes a few minutes and can help you decide whether to monitor at home or seek medical care sooner rather than later.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Splinter hemorrhages are small, dark red or brown lines under the nails. They can be a sign of endocarditis, which is an infection of the heart lining. However, they are not specific to endocarditis and can appear in other conditions as well.

Key Points:

  • Endocarditis Connection: According to the medical literature, splinter hemorrhages can be associated with endocarditis, but they are not definitive indicators on their own.
  • Other Conditions: They can also occur due to trauma or other systemic conditions, which means their presence alone is not enough to diagnose endocarditis.
  • Diagnostic Importance: While they can be a clue, doctors use a combination of signs, symptoms, and tests to diagnose endocarditis effectively.

In summary, if you notice splinter hemorrhages, it is important to consider them as part of a broader picture rather than as a standalone sign of a serious condition like endocarditis. To better understand what might be causing your symptoms, you can use our free AI symptom checker for personalized insights.

(References)

  • Schwiebert R, Baig W, Wu J, & Sandoe JAT. (2022). Diagnostic accuracy of splinter haemorrhages in patients .... Heart (British Cardiac Society), 35842232.

  • Ruwanpathirana P, Athukorala H, Weeratunga P, & Karunanayake P. (2023). Unilateral Osler nodes, Janeway lesions and splinter .... BMC infectious diseases, 37415115.

  • Lamas CC, & Eykyn SJ. (1997). Suggested modifications to the Duke criteria for the clinical .... Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 9314466.

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