Splinter haemorrhages

Splinter hemorrhages are thin red or brown lines that run in the direction of the nail. This is caused by bleeding under the nail bed, typically due to small blood vessel damage or trauma.. They are harmless on their own and may indicate minor conditions but they can be a sign of more advanced conditions like infective endocarditis, psoriasis and mitral stenosis.

Source: DermNetNZ.org [1]

Splinter haemorrhages

Wooden-splinter shaped line under the bail with a brown discolouration

Source: ResearchGate [4]

Splinter haemorrhages

Brown streaks on fingernails, caused by bacterial endocarditis

[1] https://dermnetnz.org/topics/splinter-haemorrhage

[2]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9421492/#:~:text=Splinter%20hemorrhages%20in%20endocarditis%20develop,catheter%20or%20graft%20(1)

[3] https://www.sciencedirect.com/topics/medicine-and-dentistry/splinter-hemorrhage

[4] https://www.researchgate.net/figure/Splinter-hemorrhage-with-bacterial-endocarditis_fig1_274262439

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