Final answer:
The main priority for a nurse caring for a client with lupus on steroids is to vigilantly monitor for signs of infection due to the immunosuppressive effects of the medication.
Step-by-step explanation:
A priority nursing intervention for a client with lupus who is receiving steroids for a flare-up is to monitor for signs of infection. Corticosteroids, which are used to control symptoms in autoimmune conditions like systemic lupus erythematosus (SLE), can suppress the immune system. Therefore, individuals taking these medications are at an increased risk for infections. Nurses must diligently observe any changes that could indicate an infection such as fever, unusual fatigue, or new onset of pain, and report these promptly to the healthcare provider.
Encouraging excessive physical activity is not advisable during a flare-up, as it can exacerbate symptoms. A diet high in fats and sugars is generally not recommended for patients with SLE, as it can contribute to other health issues. While rest and relaxation are also important for patients experiencing a flare-up, they aren't the highest priority compared to monitoring for infections.