Photo quiz. Chronic, papular rash that develops a wheal when rubbed.
Lain
Edward L
EL
University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
Hsu
Sylvia
S
D000328:Adult; D005260:Female; D006801:Humans; D011537:Pruritus / Q000209:etiology; D014582:Urticaria Pigmentosa / Q000175:diagnosis*