Final answer:
The nurse should immediately schedule an appointment for the client to see the healthcare provider due to signs suggestive of a secondary bacterial infection. Continuation of the corticosteroid without evaluation or applying plastic wrap could worsen the condition. A medical assessment and possible change in treatment are necessary.
Step-by-step explanation:
The appearance of increased erythema and purulent exudate suggests a potential secondary bacterial infection at the site of the skin rash, which may be exacerbated by the use of the corticosteroid, triamcinolone. The appropriate action for the nurse in this situation is to schedule an appointment for the client to see the healthcare provider immediately. Corticosteroids like triamcinolone can suppress the immune response and thereby mask or worsen certain infections. It is important for the healthcare provider to assess the area and possibly culture the exudate, as well as consider discontinuing the corticosteroid and prescribing an antibiotic if an infection is confirmed.
Instructing the client to complete all prescribed doses without assessing the worsening symptoms could lead to further complications. Continuing the ointment without medical review could exacerbate the infection, and advising the application of plastic wrap is counterproductive as it could create an anaerobic environment, facilitating the growth of bacteria. A prompt medical evaluation is crucial to address the new symptoms effectively and prevent any further progression of the infection.