LAUSR

A 35-year-old woman presented to our dermatology department with itchy erythema after using metronidazole intravaginal ovules. She had received the ovules from a gynaecology clinic for treatment of heavy vaginal discharge. Despite the onset of buttock-associated itchiness, she continued ovule treatment; however, itchiness expanded to the back and abdomen. The patient visited our hospital's emergency department and received 125 mg intravenous methylprednisolone; she was then referred to our dermatology department. Examination revealed mainly genital-associated erythema (Figure 1A). The thigh and lower leg exhibited welldemarcated erythema and small vesicles (Figure 1B,C). We thus prescribed 30 mg oral prednisolone for a five days, followed by dose tapering. Six weeks later, a patch test on the upper arm (where no