By Gary M. White, MD
In talon noir, also known as black heel, blood appears as black dots. The condition is induced by vigorous exercise, e.g. basketball, volleyball, which through sheering forces, causes extravasation of blood. A similar finding called pigmented palmar petechie may be found on the palms.
Tiny pinpoint black dots coalescing into a plaque appear on the lateral edges of the heel. Bilateral lesions are common. These changes may occur on the palms as well.
No treatment is needed. The main differential is warts and rarely melanoma. The lesions will be shed over several weeks [Cutis 1977;20;393].
The same condition may occur on the fingers.
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