Dermatographism

QUESTION 8

A 36-year-old woman was recently evaluated by her dermatologist for a scabies infestation. She and her family were successfully treated with permethrin cream 5%. After initial resolution of symptoms, she presents with ongoing pruritus, particularly around her bra straps, that is worse in the evenings. On examination, gentle scraping on the back with a tongue depressor in a linear fashion results in erythema with raised wheals in the distribution of the scraping (8).