Our Services
Medical Information
Helpful Resources
Published on: 8/20/2026
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
Quick answers
The most common questions people search after this page
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.
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.
We would love to help them too.
For First Time Users
We provide a database of explanations from real doctors on a range of medical topics. Get started by exploring our library of questions and topics you want to learn more about.
Was this page helpful?
Purpose and positioning of servicesUbie Doctor's Note is a service for informational purposes. The provision of information by physicians, medical professionals, etc. is not a medical treatment. If medical treatment is required, please consult your doctor or medical institution. We strive to provide reliable and accurate information, but we do not guarantee the completeness of the content. If you find any errors in the information, please contact us.