Dr Chris Peace diagnoses a fitness fanatic with a fungal infection after she notices an unusual red patch on her leg has spread to her thighs. Meanwhile, Dr Marietta Swanne suspects an elderly patient's own livid breakout could be caused by cellulitis. Across the corridor, Dr Joanna Brigg also deals with a skin disorder, this time in the form of a full body rash she believes could be a symptom of pityiasis rosea, a non-contagious condition that can last up to six weeks.