Severe skin reaction follows a topical treatment

An engineer presents with a worsening rash complicating a month-old ankle injury.
Chethaki Nanayakkara

Mark, a 30-year-old engineer, presents to his GP with a progressively worsening localised itchy rash on the dorsum, medial and lateral aspects of the left ankle on the background of an ankle injury approximately one month prior.

The rash began five days ago. Mark reports experiencing an exacerbation of allergic rhinitis, with clear rhinorrhoea and itchy eyes, the day before rash onset.