Black toenails imply bleeding under the nail.
This can come from a bone spur that grows on top of the tip of the toe bone. The spur then pushes against the nail and the
nail bed bleeds. These show up in x-rays. Typically the podiatrist will suggest removing the nail. Avoid tight shoes, too, and that may help. Constant hitting of the big toe at the top of the show is what aggravates toe spurs.
The medical term for spurs under the toenail is:
Subungal exostosis
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Weezie looking at petunias 8.25.2017
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