By Gary M. White, MD

black-spot poison ivy

Black-spot Poison Ivy (BSPI) is a "pseudo" skin condition in which black spots develop on the skin in a patient recently exposed to poison ivy. The color results from the urushiol sap turning black in the presence of oxygen and moisture via a dopa oxidase-mediated oxidation.


Small black dots on the skin that can be scraped off are characteristic of black-spot poison ivy.

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black-spot poison ivy black-spot poison ivy


Dermatology Online Journal 18(10)


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