Whip-marked rash after shiitake mushrooms reveals a rare dermatitis case
A 23-year-old Florida woman developed whip‑mark–like red streaks on her back two days after eating shiitake mushrooms. Doctors diagnosed shiitake dermatitis, a rare inflammatory skin reaction linked to lentinan in the mushroom, with risk possibly influenced by how the mushrooms are grown. She received a topical steroid, an antifungal, and antihistamines/corticosteroids; the rash resolved in about three weeks, and she continued consuming shiitake mushrooms without recurrence.
