Medical Questions » Nails Questions » Question No. 713
| Question: | I am told that black splinter-like longitudinal markings under my fingernails signify dire and dreadful things. Is this so? |
| Answer: | There are a number of significant conditions that can cause these splinter-like black lines under your fingernails, but by far the most common cause is repetitive minor injuries to the nails.
Other causes include skin conditions such as eczema and psoriasis, fungal infections of the nail bed, rheumatoid arthritis, bleeding disorders and, most seriously, a rare type of heart infection.
If these marks are something that you cannot easily account for, it is worthwhile having a comprehensive check-up by your general practitioner.
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