INSTANT appointment
May 27, 2021
3 minutes
What is it?
Q My son has a dark line on his toenail and has had it for years - what might it be? Jennifer, Sheffield
A A black line under the toenail is called a splinter haemorrhage. Most commonly this occurs following trauma, such as dropping something heavy on the toe.
However, rarely, splinter haemorrhages can be a sign of underlying disease.
I would suggest if your son
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