To the Editor.—
A black spot developed on my right heel in December 1975, at which time I was not engaged in any athletic activity. The lesion persisted for several months and spontaneously cleared.Recently (August 1976), I had difficulty in getting into my shoes, I recalled similar trouble with the same shoes when the black spot appeared.It seems that trauma, athletic or otherwise, may cause calcaneal petechiae.1
Saunders TS. Nonathletic Calcaneal Petechiae. Arch Dermatol. 1977;113(4):519. doi:10.1001/archderm.1977.01640040127023
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