BLACK-SPOT POISON IVY

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.

Clinical

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

Additional Pictures

black-spot poison ivy black-spot poison ivy

References

Dermatology Online Journal 18(10)

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